Using the factoring method, solve for the roots of quadratic equation

Question

4x^2=16

Answer 1

4x^2 = 16
x^2 = 4
x^2-4 = 0. The difference of 2 squares:
(x+2)(x-2) = 0

x+2 = 0
X = -2.

x-2 = 0
X = 2.