Question

What are the solutions to the quadratic equation 4x2 = 64?

x = −16 and x = 16
x = −8 and x = 8
x = −4 and x = 4
x = −2 and x = 2

Answer 1

x = −4 and x = 4

Explanation:

if you do divide its all the opposite 8÷64=8 4×2=8 8×32=4 or 8÷-2=-4