Calculus Examples

$x^{2} y^{3} - 2 x y = 6 x + y + 1$

Step 1

Subtract $6 x$ from both sides of the equation.

$x^{2} y^{3} - 2 x y - 6 x = y + 1$

Step 2

Move all the expressions to the left side of the equation.

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Step 2.1

Subtract $y$ from both sides of the equation.

$x^{2} y^{3} - 2 x y - 6 x - y = 1$

Step 2.2

Subtract $1$ from both sides of the equation.

$x^{2} y^{3} - 2 x y - 6 x - y - 1 = 0$

Step 3

Use the quadratic formula to find the solutions.

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

Step 4

Substitute the values $a = y^{3}$ , $b = - 2 y - 6$ , and $c = - y - 1$ into the quadratic formula and solve for $x$ .

$\frac{- (- 2 y - 6) \pm \sqrt{{(- 2 y - 6)}^{2} - 4 \cdot (y^{3} \cdot (- y - 1))}}{2 y^{3}}$

Step 5

Simplify the numerator.

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Step 5.1

Apply the distributive property.

$x = \frac{- (- 2 y) + 6 \pm \sqrt{{(- 2 y - 6)}^{2} - 4 \cdot y^{3} \cdot (- y - 1)}}{2 y^{3}}$

Step 5.2

Multiply $- 2$ by $- 1$ .

$x = \frac{2 y + 6 \pm \sqrt{{(- 2 y - 6)}^{2} - 4 \cdot y^{3} \cdot (- y - 1)}}{2 y^{3}}$

Step 5.3

Multiply $- 1$ by $- 6$ .

$x = \frac{2 y + 6 \pm \sqrt{{(- 2 y - 6)}^{2} - 4 \cdot y^{3} \cdot (- y - 1)}}{2 y^{3}}$

Step 5.4

Add parentheses.

$x = \frac{2 y + 6 \pm \sqrt{{(- 2 y - 6)}^{2} - 4 \cdot (y^{3} \cdot (- y - 1))}}{2 y^{3}}$

Step 5.5

Let $u = y^{3} \cdot (- y - 1)$ . Substitute $u$ for all occurrences of $y^{3} \cdot (- y - 1)$ .

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Step 5.5.1

Rewrite ${(- 2 y - 6)}^{2}$ as $(- 2 y - 6) (- 2 y - 6)$ .

$x = \frac{2 y + 6 \pm \sqrt{(- 2 y - 6) (- 2 y - 6) - 4 \cdot u}}{2 y^{3}}$

Step 5.5.2

Expand $(- 2 y - 6) (- 2 y - 6)$ using the FOIL Method.

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Step 5.5.2.1

Apply the distributive property.

$x = \frac{2 y + 6 \pm \sqrt{- 2 y (- 2 y - 6) - 6 (- 2 y - 6) - 4 \cdot u}}{2 y^{3}}$

Step 5.5.2.2

Apply the distributive property.

$x = \frac{2 y + 6 \pm \sqrt{- 2 y (- 2 y) - 2 y \cdot - 6 - 6 (- 2 y - 6) - 4 \cdot u}}{2 y^{3}}$

Step 5.5.2.3

Apply the distributive property.

$x = \frac{2 y + 6 \pm \sqrt{- 2 y (- 2 y) - 2 y \cdot - 6 - 6 (- 2 y) - 6 \cdot - 6 - 4 \cdot u}}{2 y^{3}}$

Step 5.5.3

Simplify and combine like terms.

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Step 5.5.3.1

Simplify each term.

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Step 5.5.3.1.1

Rewrite using the commutative property of multiplication.

$x = \frac{2 y + 6 \pm \sqrt{- 2 \cdot (- 2 y \cdot y) - 2 y \cdot - 6 - 6 (- 2 y) - 6 \cdot - 6 - 4 \cdot u}}{2 y^{3}}$

Step 5.5.3.1.2

Multiply $y$ by $y$ by adding the exponents.

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Step 5.5.3.1.2.1

Move $y$ .

$x = \frac{2 y + 6 \pm \sqrt{- 2 \cdot (- 2 (y \cdot y)) - 2 y \cdot - 6 - 6 (- 2 y) - 6 \cdot - 6 - 4 \cdot u}}{2 y^{3}}$

Step 5.5.3.1.2.2

Multiply $y$ by $y$ .

$x = \frac{2 y + 6 \pm \sqrt{- 2 \cdot (- 2 y^{2}) - 2 y \cdot - 6 - 6 (- 2 y) - 6 \cdot - 6 - 4 \cdot u}}{2 y^{3}}$

Step 5.5.3.1.3

Multiply $- 2$ by $- 2$ .

$x = \frac{2 y + 6 \pm \sqrt{4 y^{2} - 2 y \cdot - 6 - 6 (- 2 y) - 6 \cdot - 6 - 4 \cdot u}}{2 y^{3}}$

Step 5.5.3.1.4

Multiply $- 6$ by $- 2$ .

$x = \frac{2 y + 6 \pm \sqrt{4 y^{2} + 12 y - 6 (- 2 y) - 6 \cdot - 6 - 4 \cdot u}}{2 y^{3}}$

Step 5.5.3.1.5

Multiply $- 2$ by $- 6$ .

$x = \frac{2 y + 6 \pm \sqrt{4 y^{2} + 12 y + 12 y - 6 \cdot - 6 - 4 \cdot u}}{2 y^{3}}$

Step 5.5.3.1.6

Multiply $- 6$ by $- 6$ .

$x = \frac{2 y + 6 \pm \sqrt{4 y^{2} + 12 y + 12 y + 36 - 4 \cdot u}}{2 y^{3}}$

Step 5.5.3.2

Add $12 y$ and $12 y$ .

$x = \frac{2 y + 6 \pm \sqrt{4 y^{2} + 24 y + 36 - 4 \cdot u}}{2 y^{3}}$

$x = \frac{2 y + 6 \pm \sqrt{4 y^{2} + 24 y + 36 - 4 u}}{2 y^{3}}$

Step 5.6

Factor $4$ out of $4 y^{2} + 24 y + 36 - 4 u$ .

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Step 5.6.1

Factor $4$ out of $4 y^{2}$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2}) + 24 y + 36 - 4 u}}{2 y^{3}}$

Step 5.6.2

Factor $4$ out of $24 y$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2}) + 4 (6 y) + 36 - 4 u}}{2 y^{3}}$

Step 5.6.3

Factor $4$ out of $36$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2}) + 4 (6 y) + 4 (9) - 4 u}}{2 y^{3}}$

Step 5.6.4

Factor $4$ out of $- 4 u$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2}) + 4 (6 y) + 4 (9) + 4 (- u)}}{2 y^{3}}$

Step 5.6.5

Factor $4$ out of $4 (y^{2}) + 4 (6 y)$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y) + 4 (9) + 4 (- u)}}{2 y^{3}}$

Step 5.6.6

Factor $4$ out of $4 (y^{2} + 6 y) + 4 (9)$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y + 9) + 4 (- u)}}{2 y^{3}}$

Step 5.6.7

Factor $4$ out of $4 (y^{2} + 6 y + 9) + 4 (- u)$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y + 9 - u)}}{2 y^{3}}$

Step 5.7

Replace all occurrences of $u$ with $y^{3} \cdot (- y - 1)$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y + 9 - (y^{3} \cdot (- y - 1)))}}{2 y^{3}}$

Step 5.8

Simplify each term.

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Step 5.8.1

Apply the distributive property.

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y + 9 - (y^{3} (- y) + y^{3} \cdot - 1))}}{2 y^{3}}$

Step 5.8.2

Rewrite using the commutative property of multiplication.

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y + 9 - (- y^{3} y + y^{3} \cdot - 1))}}{2 y^{3}}$

Step 5.8.3

Move $- 1$ to the left of $y^{3}$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y + 9 - (- y^{3} y - 1 \cdot y^{3}))}}{2 y^{3}}$

Step 5.8.4

Simplify each term.

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Step 5.8.4.1

Multiply $y^{3}$ by $y$ by adding the exponents.

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Step 5.8.4.1.1

Move $y$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y + 9 - (- (y \cdot y^{3}) - 1 \cdot y^{3}))}}{2 y^{3}}$

Step 5.8.4.1.2

Multiply $y$ by $y^{3}$ .

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Step 5.8.4.1.2.1

Raise $y$ to the power of $1$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y + 9 - (- (y \cdot y^{3}) - 1 \cdot y^{3}))}}{2 y^{3}}$

Step 5.8.4.1.2.2

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

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y + 9 - (- y^{1 + 3} - 1 \cdot y^{3}))}}{2 y^{3}}$

Step 5.8.4.1.3

Add $1$ and $3$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y + 9 - (- y^{4} - 1 \cdot y^{3}))}}{2 y^{3}}$

Step 5.8.4.2

Rewrite $- 1 y^{3}$ as $- y^{3}$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y + 9 - (- y^{4} - y^{3}))}}{2 y^{3}}$

Step 5.8.5

Apply the distributive property.

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y + 9 + y^{4} + y^{3})}}{2 y^{3}}$

Step 5.8.6

Multiply $- - y^{4}$ .

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Step 5.8.6.1

Multiply $- 1$ by $- 1$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y + 9 + 1 y^{4} + y^{3})}}{2 y^{3}}$

Step 5.8.6.2

Multiply $y^{4}$ by $1$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y + 9 + y^{4} + y^{3})}}{2 y^{3}}$

Step 5.8.7

Multiply $- - y^{3}$ .

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Step 5.8.7.1

Multiply $- 1$ by $- 1$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y + 9 + y^{4} + 1 y^{3})}}{2 y^{3}}$

Step 5.8.7.2

Multiply $y^{3}$ by $1$ .

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{2} + 6 y + 9 + y^{4} + y^{3})}}{2 y^{3}}$

Step 5.9

Reorder terms.

$x = \frac{2 y + 6 \pm \sqrt{4 (y^{4} + y^{3} + y^{2} + 6 y + 9)}}{2 y^{3}}$

Step 5.10

Rewrite $4 (y^{4} + y^{3} + y^{2} + 6 y + 9)$ as $2^{2} ({(y^{2})}^{2} + y^{3} + y^{2} + 6 y + 9)$ .

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Step 5.10.1

Rewrite $4$ as $2^{2}$ .

$x = \frac{2 y + 6 \pm \sqrt{2^{2} (y^{4} + y^{3} + y^{2} + 6 y + 9)}}{2 y^{3}}$

Step 5.10.2

Rewrite $y^{4}$ as ${(y^{2})}^{2}$ .

$x = \frac{2 y + 6 \pm \sqrt{2^{2} ({(y^{2})}^{2} + y^{3} + y^{2} + 6 y + 9)}}{2 y^{3}}$

Step 5.11

Pull terms out from under the radical.

$x = \frac{2 y + 6 \pm 2 \sqrt{{(y^{2})}^{2} + y^{3} + y^{2} + 6 y + 9}}{2 y^{3}}$

Step 5.12

Multiply the exponents in ${(y^{2})}^{2}$ .

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Step 5.12.1

Apply the power rule and multiply exponents, ${(a^{m})}^{n} = a^{m n}$ .

$x = \frac{2 y + 6 \pm 2 \sqrt{y^{2 \cdot 2} + y^{3} + y^{2} + 6 y + 9}}{2 y^{3}}$

Step 5.12.2

Multiply $2$ by $2$ .

$x = \frac{2 y + 6 \pm 2 \sqrt{y^{4} + y^{3} + y^{2} + 6 y + 9}}{2 y^{3}}$

Step 6

The final answer is the combination of both solutions.

$x = \frac{y + 3 + \sqrt{y^{4} + y^{3} + y^{2} + 6 y + 9}}{y^{3}}$

$x = \frac{y + 3 - \sqrt{y^{4} + y^{3} + y^{2} + 6 y + 9}}{y^{3}}$