Find the Roots (Zeros) x^2+7=43

$x^{2} + 7 = 43$

Step 1

Move all terms not containing $x$ to the right side of the equation.

Subtract $7$ from both sides of the equation.

$x^{2} = 43 - 7$

Subtract $7$ from $43$ .

$x^{2} = 36$

Step 2

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

$x = \pm \sqrt{36}$

Step 3

Simplify $\pm \sqrt{36}$ .

Rewrite $36$ as $6^{2}$ .

$x = \pm \sqrt{6^{2}}$

Pull terms out from under the radical, assuming positive real numbers.

$x = \pm 6$

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.

$x = 6$

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

$x = - 6$

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

$x = 6, - 6$

Step 5