Finite Math Examples

$0.3 x + 0.3 x^{2} + 0.8 x^{3} = 0$ , $0.5 x + 0.6 x^{2} = 0$ , $0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 1

Factor $0.1 x$ out of $0.3 x + 0.3 x^{2} + 0.8 x^{3}$ .

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Step 1.1

Factor $0.1 x$ out of $0.3 x$ .

$0.1 x (3) + 0.3 x^{2} + 0.8 x^{3} = 0$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 1.2

Factor $0.1 x$ out of $0.3 x^{2}$ .

$0.1 x (3) + 0.1 x (3 x) + 0.8 x^{3} = 0$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 1.3

Factor $0.1 x$ out of $0.8 x^{3}$ .

$0.1 x (3) + 0.1 x (3 x) + 0.1 x (8 x^{2}) = 0$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 1.4

Factor $0.1 x$ out of $0.1 x (3) + 0.1 x (3 x)$ .

$0.1 x (3 + 3 x) + 0.1 x (8 x^{2}) = 0$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 1.5

Factor $0.1 x$ out of $0.1 x (3 + 3 x) + 0.1 x (8 x^{2})$ .

$0.1 x (3 + 3 x + 8 x^{2}) = 0$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$0.1 x (3 + 3 x + 8 x^{2}) = 0$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 2

If any individual factor on the left side of the equation is equal to $0$ , the entire expression will be equal to $0$ .

$x = 0$

$3 + 3 x + 8 x^{2} = 0$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 3

Set $x$ equal to $0$ .

$x = 0$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4

Set $3 + 3 x + 8 x^{2}$ equal to $0$ and solve for $x$ .

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Step 4.1

Set $3 + 3 x + 8 x^{2}$ equal to $0$ .

$3 + 3 x + 8 x^{2} = 0$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2

Solve $3 + 3 x + 8 x^{2} = 0$ for $x$ .

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Step 4.2.1

Use the quadratic formula to find the solutions.

$\frac{- b \pm \sqrt{b^{2} - 4 (a c)}}{2 a}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.2

Substitute the values $a = 8$ , $b = 3$ , and $c = 3$ into the quadratic formula and solve for $x$ .

$\frac{- 3 \pm \sqrt{3^{2} - 4 \cdot (8 \cdot 3)}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.3

Simplify.

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Step 4.2.3.1

Simplify the numerator.

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Step 4.2.3.1.1

Raise $3$ to the power of $2$ .

$x = \frac{- 3 \pm \sqrt{9 - 4 \cdot 8 \cdot 3}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.3.1.2

Multiply $- 4 \cdot 8 \cdot 3$ .

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Step 4.2.3.1.2.1

Multiply $- 4$ by $8$ .

$x = \frac{- 3 \pm \sqrt{9 - 32 \cdot 3}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.3.1.2.2

Multiply $- 32$ by $3$ .

$x = \frac{- 3 \pm \sqrt{9 - 96}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = \frac{- 3 \pm \sqrt{9 - 96}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.3.1.3

Subtract $96$ from $9$ .

$x = \frac{- 3 \pm \sqrt{- 87}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.3.1.4

Rewrite $- 87$ as $- 1 (87)$ .

$x = \frac{- 3 \pm \sqrt{- 1 \cdot 87}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.3.1.5

Rewrite $\sqrt{- 1 (87)}$ as $\sqrt{- 1} \cdot \sqrt{87}$ .

$x = \frac{- 3 \pm \sqrt{- 1} \cdot \sqrt{87}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.3.1.6

Rewrite $\sqrt{- 1}$ as $i$ .

$x = \frac{- 3 \pm i \sqrt{87}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = \frac{- 3 \pm i \sqrt{87}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.3.2

Multiply $2$ by $8$ .

$x = \frac{- 3 \pm i \sqrt{87}}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = \frac{- 3 \pm i \sqrt{87}}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.4

Simplify the expression to solve for the $+$ portion of the $\pm$ .

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Step 4.2.4.1

Simplify the numerator.

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Step 4.2.4.1.1

Raise $3$ to the power of $2$ .

$x = \frac{- 3 \pm \sqrt{9 - 4 \cdot 8 \cdot 3}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.4.1.2

Multiply $- 4 \cdot 8 \cdot 3$ .

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Step 4.2.4.1.2.1

Multiply $- 4$ by $8$ .

$x = \frac{- 3 \pm \sqrt{9 - 32 \cdot 3}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.4.1.2.2

Multiply $- 32$ by $3$ .

$x = \frac{- 3 \pm \sqrt{9 - 96}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = \frac{- 3 \pm \sqrt{9 - 96}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.4.1.3

Subtract $96$ from $9$ .

$x = \frac{- 3 \pm \sqrt{- 87}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.4.1.4

Rewrite $- 87$ as $- 1 (87)$ .

$x = \frac{- 3 \pm \sqrt{- 1 \cdot 87}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.4.1.5

Rewrite $\sqrt{- 1 (87)}$ as $\sqrt{- 1} \cdot \sqrt{87}$ .

$x = \frac{- 3 \pm \sqrt{- 1} \cdot \sqrt{87}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.4.1.6

Rewrite $\sqrt{- 1}$ as $i$ .

$x = \frac{- 3 \pm i \sqrt{87}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = \frac{- 3 \pm i \sqrt{87}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.4.2

Multiply $2$ by $8$ .

$x = \frac{- 3 \pm i \sqrt{87}}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.4.3

Change the $\pm$ to $+$ .

$x = \frac{- 3 + i \sqrt{87}}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.4.4

Rewrite $- 3$ as $- 1 (3)$ .

$x = \frac{- 1 \cdot 3 + i \sqrt{87}}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.4.5

Factor $- 1$ out of $i \sqrt{87}$ .

$x = \frac{- 1 \cdot 3 - (- i \sqrt{87})}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.4.6

Factor $- 1$ out of $- 1 (3) - (- i \sqrt{87})$ .

$x = \frac{- 1 (3 - i \sqrt{87})}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.4.7

Move the negative in front of the fraction.

$x = - \frac{3 - i \sqrt{87}}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = - \frac{3 - i \sqrt{87}}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.5

Simplify the expression to solve for the $-$ portion of the $\pm$ .

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Step 4.2.5.1

Simplify the numerator.

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Step 4.2.5.1.1

Raise $3$ to the power of $2$ .

$x = \frac{- 3 \pm \sqrt{9 - 4 \cdot 8 \cdot 3}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.5.1.2

Multiply $- 4 \cdot 8 \cdot 3$ .

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Step 4.2.5.1.2.1

Multiply $- 4$ by $8$ .

$x = \frac{- 3 \pm \sqrt{9 - 32 \cdot 3}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.5.1.2.2

Multiply $- 32$ by $3$ .

$x = \frac{- 3 \pm \sqrt{9 - 96}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = \frac{- 3 \pm \sqrt{9 - 96}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.5.1.3

Subtract $96$ from $9$ .

$x = \frac{- 3 \pm \sqrt{- 87}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.5.1.4

Rewrite $- 87$ as $- 1 (87)$ .

$x = \frac{- 3 \pm \sqrt{- 1 \cdot 87}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.5.1.5

Rewrite $\sqrt{- 1 (87)}$ as $\sqrt{- 1} \cdot \sqrt{87}$ .

$x = \frac{- 3 \pm \sqrt{- 1} \cdot \sqrt{87}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.5.1.6

Rewrite $\sqrt{- 1}$ as $i$ .

$x = \frac{- 3 \pm i \sqrt{87}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = \frac{- 3 \pm i \sqrt{87}}{2 \cdot 8}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.5.2

Multiply $2$ by $8$ .

$x = \frac{- 3 \pm i \sqrt{87}}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.5.3

Change the $\pm$ to $-$ .

$x = \frac{- 3 - i \sqrt{87}}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.5.4

Rewrite $- 3$ as $- 1 (3)$ .

$x = \frac{- 1 \cdot 3 - i \sqrt{87}}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.5.5

Factor $- 1$ out of $- i \sqrt{87}$ .

$x = \frac{- 1 \cdot 3 - (i \sqrt{87})}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.5.6

Factor $- 1$ out of $- 1 (3) - (i \sqrt{87})$ .

$x = \frac{- 1 (3 + i \sqrt{87})}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.5.7

Move the negative in front of the fraction.

$x = - \frac{3 + i \sqrt{87}}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = - \frac{3 + i \sqrt{87}}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 4.2.6

The final answer is the combination of both solutions.

$x = - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 5

The final solution is all the values that make $0.1 x (3 + 3 x + 8 x^{2}) = 0$ true.

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.5 x + 0.6 x^{2} = 0$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 6

Factor $0.1 x$ out of $0.5 x + 0.6 x^{2}$ .

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Step 6.1

Factor $0.1 x$ out of $0.5 x$ .

$0.1 x (5) + 0.6 x^{2} = 0$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 6.2

Factor $0.1 x$ out of $0.6 x^{2}$ .

$0.1 x (5) + 0.1 x (6 x) = 0$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 6.3

Factor $0.1 x$ out of $0.1 x (5) + 0.1 x (6 x)$ .

$0.1 x (5 + 6 x) = 0$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$0.1 x (5 + 6 x) = 0$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 7

If any individual factor on the left side of the equation is equal to $0$ , the entire expression will be equal to $0$ .

$x = 0$

$5 + 6 x = 0$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 8

Set $x$ equal to $0$ .

$x = 0$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 9

Set $5 + 6 x$ equal to $0$ and solve for $x$ .

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Step 9.1

Set $5 + 6 x$ equal to $0$ .

$5 + 6 x = 0$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 9.2

Solve $5 + 6 x = 0$ for $x$ .

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Step 9.2.1

Subtract $5$ from both sides of the equation.

$6 x = - 5$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 9.2.2

Divide each term in $6 x = - 5$ by $6$ and simplify.

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Step 9.2.2.1

Divide each term in $6 x = - 5$ by $6$ .

$\frac{6 x}{6} = \frac{- 5}{6}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 9.2.2.2

Simplify the left side.

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Step 9.2.2.2.1

Cancel the common factor of $6$ .

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Step 9.2.2.2.1.1

Cancel the common factor.

$\frac{6 x}{6} = \frac{- 5}{6}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 9.2.2.2.1.2

Divide $x$ by $1$ .

$x = \frac{- 5}{6}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = \frac{- 5}{6}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = \frac{- 5}{6}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 9.2.2.3

Simplify the right side.

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Step 9.2.2.3.1

Move the negative in front of the fraction.

$x = - \frac{5}{6}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = - \frac{5}{6}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = - \frac{5}{6}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = - \frac{5}{6}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = - \frac{5}{6}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 10

The final solution is all the values that make $0.1 x (5 + 6 x) = 0$ true.

$x = 0, - \frac{5}{6}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$0.2 x + 0.1 x^{2} + 0.2 x^{3} = 0$

Step 11

Factor $0.1 x$ out of $0.2 x + 0.1 x^{2} + 0.2 x^{3}$ .

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Step 11.1

Factor $0.1 x$ out of $0.2 x$ .

$0.1 x (2) + 0.1 x^{2} + 0.2 x^{3} = 0$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 11.2

Factor $0.1 x$ out of $0.1 x^{2}$ .

$0.1 x (2) + 0.1 x (x) + 0.2 x^{3} = 0$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 11.3

Factor $0.1 x$ out of $0.2 x^{3}$ .

$0.1 x (2) + 0.1 x (x) + 0.1 x (2 x^{2}) = 0$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 11.4

Factor $0.1 x$ out of $0.1 x (2) + 0.1 x (x)$ .

$0.1 x (2 + x) + 0.1 x (2 x^{2}) = 0$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 11.5

Factor $0.1 x$ out of $0.1 x (2 + x) + 0.1 x (2 x^{2})$ .

$0.1 x (2 + x + 2 x^{2}) = 0$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

$0.1 x (2 + x + 2 x^{2}) = 0$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 12

If any individual factor on the left side of the equation is equal to $0$ , the entire expression will be equal to $0$ .

$x = 0$

$2 + x + 2 x^{2} = 0$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 13

Set $x$ equal to $0$ .

$x = 0$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14

Set $2 + x + 2 x^{2}$ equal to $0$ and solve for $x$ .

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Step 14.1

Set $2 + x + 2 x^{2}$ equal to $0$ .

$2 + x + 2 x^{2} = 0$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2

Solve $2 + x + 2 x^{2} = 0$ for $x$ .

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Step 14.2.1

Use the quadratic formula to find the solutions.

$\frac{- b \pm \sqrt{b^{2} - 4 (a c)}}{2 a}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.2

Substitute the values $a = 2$ , $b = 1$ , and $c = 2$ into the quadratic formula and solve for $x$ .

$\frac{- 1 \pm \sqrt{1^{2} - 4 \cdot (2 \cdot 2)}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.3

Simplify.

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Step 14.2.3.1

Simplify the numerator.

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Step 14.2.3.1.1

One to any power is one.

$x = \frac{- 1 \pm \sqrt{1 - 4 \cdot 2 \cdot 2}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.3.1.2

Multiply $- 4 \cdot 2 \cdot 2$ .

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Step 14.2.3.1.2.1

Multiply $- 4$ by $2$ .

$x = \frac{- 1 \pm \sqrt{1 - 8 \cdot 2}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.3.1.2.2

Multiply $- 8$ by $2$ .

$x = \frac{- 1 \pm \sqrt{1 - 16}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

$x = \frac{- 1 \pm \sqrt{1 - 16}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.3.1.3

Subtract $16$ from $1$ .

$x = \frac{- 1 \pm \sqrt{- 15}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.3.1.4

Rewrite $- 15$ as $- 1 (15)$ .

$x = \frac{- 1 \pm \sqrt{- 1 \cdot 15}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.3.1.5

Rewrite $\sqrt{- 1 (15)}$ as $\sqrt{- 1} \cdot \sqrt{15}$ .

$x = \frac{- 1 \pm \sqrt{- 1} \cdot \sqrt{15}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.3.1.6

Rewrite $\sqrt{- 1}$ as $i$ .

$x = \frac{- 1 \pm i \sqrt{15}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

$x = \frac{- 1 \pm i \sqrt{15}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.3.2

Multiply $2$ by $2$ .

$x = \frac{- 1 \pm i \sqrt{15}}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

$x = \frac{- 1 \pm i \sqrt{15}}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.4

Simplify the expression to solve for the $+$ portion of the $\pm$ .

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Step 14.2.4.1

Simplify the numerator.

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Step 14.2.4.1.1

One to any power is one.

$x = \frac{- 1 \pm \sqrt{1 - 4 \cdot 2 \cdot 2}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.4.1.2

Multiply $- 4 \cdot 2 \cdot 2$ .

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Step 14.2.4.1.2.1

Multiply $- 4$ by $2$ .

$x = \frac{- 1 \pm \sqrt{1 - 8 \cdot 2}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.4.1.2.2

Multiply $- 8$ by $2$ .

$x = \frac{- 1 \pm \sqrt{1 - 16}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

$x = \frac{- 1 \pm \sqrt{1 - 16}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.4.1.3

Subtract $16$ from $1$ .

$x = \frac{- 1 \pm \sqrt{- 15}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.4.1.4

Rewrite $- 15$ as $- 1 (15)$ .

$x = \frac{- 1 \pm \sqrt{- 1 \cdot 15}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.4.1.5

Rewrite $\sqrt{- 1 (15)}$ as $\sqrt{- 1} \cdot \sqrt{15}$ .

$x = \frac{- 1 \pm \sqrt{- 1} \cdot \sqrt{15}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.4.1.6

Rewrite $\sqrt{- 1}$ as $i$ .

$x = \frac{- 1 \pm i \sqrt{15}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

$x = \frac{- 1 \pm i \sqrt{15}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.4.2

Multiply $2$ by $2$ .

$x = \frac{- 1 \pm i \sqrt{15}}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.4.3

Change the $\pm$ to $+$ .

$x = \frac{- 1 + i \sqrt{15}}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.4.4

Rewrite $- 1$ as $- 1 (1)$ .

$x = \frac{- 1 \cdot 1 + i \sqrt{15}}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.4.5

Factor $- 1$ out of $i \sqrt{15}$ .

$x = \frac{- 1 \cdot 1 - (- i \sqrt{15})}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.4.6

Factor $- 1$ out of $- 1 (1) - (- i \sqrt{15})$ .

$x = \frac{- 1 (1 - i \sqrt{15})}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.4.7

Move the negative in front of the fraction.

$x = - \frac{1 - i \sqrt{15}}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

$x = - \frac{1 - i \sqrt{15}}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.5

Simplify the expression to solve for the $-$ portion of the $\pm$ .

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Step 14.2.5.1

Simplify the numerator.

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Step 14.2.5.1.1

One to any power is one.

$x = \frac{- 1 \pm \sqrt{1 - 4 \cdot 2 \cdot 2}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.5.1.2

Multiply $- 4 \cdot 2 \cdot 2$ .

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Step 14.2.5.1.2.1

Multiply $- 4$ by $2$ .

$x = \frac{- 1 \pm \sqrt{1 - 8 \cdot 2}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.5.1.2.2

Multiply $- 8$ by $2$ .

$x = \frac{- 1 \pm \sqrt{1 - 16}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

$x = \frac{- 1 \pm \sqrt{1 - 16}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.5.1.3

Subtract $16$ from $1$ .

$x = \frac{- 1 \pm \sqrt{- 15}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.5.1.4

Rewrite $- 15$ as $- 1 (15)$ .

$x = \frac{- 1 \pm \sqrt{- 1 \cdot 15}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.5.1.5

Rewrite $\sqrt{- 1 (15)}$ as $\sqrt{- 1} \cdot \sqrt{15}$ .

$x = \frac{- 1 \pm \sqrt{- 1} \cdot \sqrt{15}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.5.1.6

Rewrite $\sqrt{- 1}$ as $i$ .

$x = \frac{- 1 \pm i \sqrt{15}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

$x = \frac{- 1 \pm i \sqrt{15}}{2 \cdot 2}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.5.2

Multiply $2$ by $2$ .

$x = \frac{- 1 \pm i \sqrt{15}}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.5.3

Change the $\pm$ to $-$ .

$x = \frac{- 1 - i \sqrt{15}}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.5.4

Rewrite $- 1$ as $- 1 (1)$ .

$x = \frac{- 1 \cdot 1 - i \sqrt{15}}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.5.5

Factor $- 1$ out of $- i \sqrt{15}$ .

$x = \frac{- 1 \cdot 1 - (i \sqrt{15})}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.5.6

Factor $- 1$ out of $- 1 (1) - (i \sqrt{15})$ .

$x = \frac{- 1 (1 + i \sqrt{15})}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.5.7

Move the negative in front of the fraction.

$x = - \frac{1 + i \sqrt{15}}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

$x = - \frac{1 + i \sqrt{15}}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 14.2.6

The final answer is the combination of both solutions.

$x = - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

$x = - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

$x = - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 15

The final solution is all the values that make $0.1 x (2 + x + 2 x^{2}) = 0$ true.

$x = 0, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}$

$x = 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}$

$x = 0, - \frac{5}{6}$

Step 16

Since the roots of an equation are the points where the solution is $0$ , set each root as a factor of the equation that equals $0$ .

$(x - (0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16})) (x - (- 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16})) (x - (0, - \frac{5}{6})) (x - (0, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4})) (x - (- 0, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4})) = 0$

Step 17

Simplify.

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Step 17.1

Subtract $0$ from $x$ .

$(x, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}) (x - 0, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}) (x - 0, - \frac{5}{6}) (x - 0, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}) (x - 0, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}) = 0$

Step 17.2

Subtract $0$ from $x$ .

$(x, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}) (x, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}) (x - 0, - \frac{5}{6}) (x - 0, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}) (x - 0, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}) = 0$

Step 17.3

Multiply $(x, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16}) (x, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16})$ .

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Step 17.3.1

Raise $(x, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16})$ to the power of $1$ .

Step 17.3.2

Raise $(x, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16})$ to the power of $1$ .

Step 17.3.3

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

${(x, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16})}^{1 + 1} (x - 0, - \frac{5}{6}) (x - 0, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}) (x - 0, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}) = 0$

Step 17.3.4

Add $1$ and $1$ .

${(x, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16})}^{2} (x - 0, - \frac{5}{6}) (x - 0, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}) (x - 0, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}) = 0$

Step 17.4

Subtract $0$ from $x$ .

${(x, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16})}^{2} (x, - \frac{5}{6}) (x - 0, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}) (x - 0, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}) = 0$

Step 17.5

Subtract $0$ from $x$ .

${(x, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16})}^{2} (x, - \frac{5}{6}) (x, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}) (x - 0, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}) = 0$

Step 17.6

Subtract $0$ from $x$ .

${(x, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16})}^{2} (x, - \frac{5}{6}) (x, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}) (x, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}) = 0$

Step 17.7

Multiply ${(x, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16})}^{2} (x, - \frac{5}{6}) (x, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}) (x, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4})$ .

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Step 17.7.1

Raise $(x, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4})$ to the power of $1$ .

${(x, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16})}^{2} (x, - \frac{5}{6}) ((x, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4}) (x, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4})) = 0$

Step 17.7.2

Raise $(x, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4})$ to the power of $1$ .

Step 17.7.3

Use the power rule $a^{m} a^{n} = a^{m + n}$ to combine exponents.

${(x, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16})}^{2} (x, - \frac{5}{6}) {(x, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4})}^{1 + 1} = 0$

Step 17.7.4

Add $1$ and $1$ .

${(x, - \frac{3 - i \sqrt{87}}{16}, - \frac{3 + i \sqrt{87}}{16})}^{2} (x, - \frac{5}{6}) {(x, - \frac{1 - i \sqrt{15}}{4}, - \frac{1 + i \sqrt{15}}{4})}^{2} = 0$