Algebra Examples

x^{2} = 12

$x^{2} = 12$

Step 1

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

$x = \pm \sqrt{12}$

Step 2

Simplify

$\pm \sqrt{12}$ .

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Step 2.1

Rewrite

$12$ as

$2^{2} \cdot 3$ .

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Step 2.1.1

Factor

$4$ out of

$12$ .

$x = \pm \sqrt{4 (3)}$

Step 2.1.2

Rewrite

$4$ as

$2^{2}$ .

$x = \pm \sqrt{2^{2} \cdot 3}$

Step 2.2

Pull terms out from under the radical.

$x = \pm 2 \sqrt{3}$

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.

$x = 2 \sqrt{3}$

Step 3.2

Next, use the negative value of the

$\pm$ to find the second solution.

$x = - 2 \sqrt{3}$

Step 3.3

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

$x = 2 \sqrt{3}, - 2 \sqrt{3}$

Step 4

The result can be shown in multiple forms.

Exact Form:

$x = 2 \sqrt{3}, - 2 \sqrt{3}$

Decimal Form:

$x = 3.46410161 \dots, - 3.46410161 \dots$