Question

-4 x elevado a 2 - 256 = 0

Answer 1

-4x -256=0
(-4x)²=256
16x²=256
x²=256/16
x²=16
x=√16
x=4

Answer 2

4x^2-256=0
4x^2=256
x^2=256/4
x^2=64
x=V64
x=8