Algebra Examples

$f (x) = \frac{6 x^{2} + 3}{x - 1}$

Step 1

Set $\frac{6 x^{2} + 3}{x - 1}$ equal to $0$ .

$\frac{6 x^{2} + 3}{x - 1} = 0$

Step 2

Solve for $x$ .

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Step 2.1

Set the numerator equal to zero.

$6 x^{2} + 3 = 0$

Step 2.2

Solve the equation for $x$ .

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Step 2.2.1

Subtract $3$ from both sides of the equation.

$6 x^{2} = - 3$

Step 2.2.2

Divide each term in $6 x^{2} = - 3$ by $6$ and simplify.

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Step 2.2.2.1

Divide each term in $6 x^{2} = - 3$ by $6$ .

$\frac{6 x^{2}}{6} = \frac{- 3}{6}$

Step 2.2.2.2

Simplify the left side.

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Step 2.2.2.2.1

Cancel the common factor of $6$ .

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Step 2.2.2.2.1.1

Cancel the common factor.

$\frac{6 x^{2}}{6} = \frac{- 3}{6}$

Step 2.2.2.2.1.2

Divide $x^{2}$ by $1$ .

$x^{2} = \frac{- 3}{6}$

Step 2.2.2.3

Simplify the right side.

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Step 2.2.2.3.1

Cancel the common factor of $- 3$ and $6$ .

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Step 2.2.2.3.1.1

Factor $3$ out of $- 3$ .

$x^{2} = \frac{3 (- 1)}{6}$

Step 2.2.2.3.1.2

Cancel the common factors.

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Step 2.2.2.3.1.2.1

Factor $3$ out of $6$ .

$x^{2} = \frac{3 \cdot - 1}{3 \cdot 2}$

Step 2.2.2.3.1.2.2

Cancel the common factor.

$x^{2} = \frac{3 \cdot - 1}{3 \cdot 2}$

Step 2.2.2.3.1.2.3

Rewrite the expression.

$x^{2} = \frac{- 1}{2}$

Step 2.2.2.3.2

Move the negative in front of the fraction.

$x^{2} = - \frac{1}{2}$

Step 2.2.3

Take the specified root of both sides of the equation to eliminate the exponent on the left side.

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

Step 2.2.4

Simplify $\pm \sqrt{- \frac{1}{2}}$ .

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Step 2.2.4.1

Rewrite $- \frac{1}{2}$ as $i^{2} \frac{1^{2}}{2}$ .

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Step 2.2.4.1.1

Rewrite $- 1$ as $i^{2}$ .

$x = \pm \sqrt{i^{2} \frac{1}{2}}$

Step 2.2.4.1.2

Rewrite $1$ as $1^{2}$ .

$x = \pm \sqrt{i^{2} \frac{1^{2}}{2}}$

Step 2.2.4.2

Pull terms out from under the radical.

$x = \pm i \sqrt{\frac{1^{2}}{2}}$

Step 2.2.4.3

One to any power is one.

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

Step 2.2.4.4

Rewrite $\sqrt{\frac{1}{2}}$ as $\frac{\sqrt{1}}{\sqrt{2}}$ .

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

Step 2.2.4.5

Any root of $1$ is $1$ .

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

Step 2.2.4.6

Multiply $\frac{1}{\sqrt{2}}$ by $\frac{\sqrt{2}}{\sqrt{2}}$ .

$x = \pm i (\frac{1}{\sqrt{2}} \cdot \frac{\sqrt{2}}{\sqrt{2}})$

Step 2.2.4.7

Combine and simplify the denominator.

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Step 2.2.4.7.1

Multiply $\frac{1}{\sqrt{2}}$ by $\frac{\sqrt{2}}{\sqrt{2}}$ .

$x = \pm i \frac{\sqrt{2}}{\sqrt{2} \sqrt{2}}$

Step 2.2.4.7.2

Raise $\sqrt{2}$ to the power of $1$ .

$x = \pm i \frac{\sqrt{2}}{{\sqrt{2}}^{1} \sqrt{2}}$

Step 2.2.4.7.3

Raise $\sqrt{2}$ to the power of $1$ .

$x = \pm i \frac{\sqrt{2}}{{\sqrt{2}}^{1} {\sqrt{2}}^{1}}$

Step 2.2.4.7.4

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

$x = \pm i \frac{\sqrt{2}}{{\sqrt{2}}^{1 + 1}}$

Step 2.2.4.7.5

Add $1$ and $1$ .

$x = \pm i \frac{\sqrt{2}}{{\sqrt{2}}^{2}}$

Step 2.2.4.7.6

Rewrite ${\sqrt{2}}^{2}$ as $2$ .

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Step 2.2.4.7.6.1

Use $\sqrt[n]{a^{x}} = a^{\frac{x}{n}}$ to rewrite $\sqrt{2}$ as $2^{\frac{1}{2}}$ .

$x = \pm i \frac{\sqrt{2}}{{(2^{\frac{1}{2}})}^{2}}$

Step 2.2.4.7.6.2

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

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

Step 2.2.4.7.6.3

Combine $\frac{1}{2}$ and $2$ .

$x = \pm i \frac{\sqrt{2}}{2^{\frac{2}{2}}}$

Step 2.2.4.7.6.4

Cancel the common factor of $2$ .

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Step 2.2.4.7.6.4.1

Cancel the common factor.

$x = \pm i \frac{\sqrt{2}}{2^{\frac{2}{2}}}$

Step 2.2.4.7.6.4.2

Rewrite the expression.

$x = \pm i \frac{\sqrt{2}}{2^{1}}$

Step 2.2.4.7.6.5

Evaluate the exponent.

$x = \pm i \frac{\sqrt{2}}{2}$

Step 2.2.4.8

Combine $i$ and $\frac{\sqrt{2}}{2}$ .

$x = \pm \frac{i \sqrt{2}}{2}$

Step 2.2.5

The complete solution is the result of both the positive and negative portions of the solution.

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Step 2.2.5.1

First, use the positive value of the $\pm$ to find the first solution.

$x = \frac{i \sqrt{2}}{2}$

Step 2.2.5.2

Next, use the negative value of the $\pm$ to find the second solution.

$x = - \frac{i \sqrt{2}}{2}$

Step 2.2.5.3

The complete solution is the result of both the positive and negative portions of the solution.

$x = \frac{i \sqrt{2}}{2}, - \frac{i \sqrt{2}}{2}$

Step 3