Answer:
The correct answer is -6
Step-by-step explanation:
In order to solve this equation, start by solving for 0.
x^2 + 12x = -36
x^2 + 12x + 36 = 0
Now factor the equation.
(x + 6)(x + 6) = 0
(x + 6)^2 = 0
Now take the square root
x + 6 = 0
x = -6
