Question

Could someone explain this to me, with an answer to it. Please

Answer 1

Explanation:

x^2 + 4x = 4x + 64

x^2 + 4x - 4x - 64 = 0

x^2 - 64 = 0

(x - 8)(x + 8) =

x - 8 = 0

x = 8

x + 8 = 0

x = -8