Math
posted by Linda on .
Solve the equation by factoring, by finding square roots, or by completing the square.
4(x+8)^2=144
I'm not sure if I'm suppose to divide or multiply the 4 to both sides..

you can go about it in two ways:
divide by 4 first. You want to divide by 4, because that removes it from the left side of the equation:
(x+8)^2 = 36
(x+8) = ±6
x = 8 ± 6
Or, you can think make the left side a perfect square:
[2(x+8)]^2 = 144
2(x+8) = ±12
x+8 = ±6
x = 8 ± 6