Solve for x 198=3x^2

$198 = 3 x^{2}$

Step 1

Rewrite the equation as $3 x^{2} = 198$ .

$3 x^{2} = 198$

Step 2

Divide each term in $3 x^{2} = 198$ by $3$ and simplify.

Divide each term in $3 x^{2} = 198$ by $3$ .

$\frac{3 x^{2}}{3} = \frac{198}{3}$

Simplify the left side.

Cancel the common factor of $3$ .

Cancel the common factor.

$\frac{3 x^{2}}{3} = \frac{198}{3}$

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

$x^{2} = \frac{198}{3}$

Simplify the right side.

Divide $198$ by $3$ .

$x^{2} = 66$

Step 3

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

$x = \pm \sqrt{66}$

Step 4

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

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

$x = \sqrt{66}$

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

$x = - \sqrt{66}$

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

$x = \sqrt{66}, - \sqrt{66}$

Step 5

The result can be shown in multiple forms.

Exact Form:

$x = \sqrt{66}, - \sqrt{66}$

Decimal Form:

$x = 8.12403840 \dots, - 8.12403840 \dots$