Question

Solve by taking square roots: x^2 - 40 = 9

Answer 1

To solve for x^2 - 40 = 9, take the square roots of both sides and solve.
The answer is x = 7, -7.

Answer 2

$x^{2} -40= 9$

$x^{2} = 49$

$\sqrt{ x^{2} } = \sqrt{49}$

x = +7 or -7