Algebra Examples

$x^{2} = - 11$

Step 1

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

$x = \pm \sqrt{- 11}$

Step 2

Simplify $\pm \sqrt{- 11}$ .

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Step 2.1

Rewrite $- 11$ as $- 1 (11)$ .

$x = \pm \sqrt{- 1 (11)}$

Step 2.2

Rewrite $\sqrt{- 1 (11)}$ as $\sqrt{- 1} \cdot \sqrt{11}$ .

$x = \pm \sqrt{- 1} \cdot \sqrt{11}$

Step 2.3

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

$x = \pm i \sqrt{11}$

Step 3

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

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Step 3.1

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

$x = i \sqrt{11}$

Step 3.2

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

$x = - i \sqrt{11}$

Step 3.3

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

$x = i \sqrt{11}, - i \sqrt{11}$