Question

Assistance needed as soon as possible, thanks!

Solve the equation.

4x2 – 8 = 56

A.
16, –16

B.
8, –8

C.
2, –2

D.
4, –4

Answer 1

answer is D

Answer 2

okay, thank you!

Answer 3

to solve it add 8

to get 4x^2 = 64

and then divide by 4

to get x^2 = 16

and then square root both side you get a posivive and negative answer

so x = -4 and +4

Answer 4

okay thanks, it makes a lot more sense now.