Question

Which equations are true for x = –2 and x = 2? Check all that apply.

Answer 1

Hi Brainiac

x² - 4 = 0

Add 4 to both sides

x² - 4 + 4 = 0 + 4

x² = 4

Now take the square root

x= +/-√4

x= 2 or x= -2

The answer is A

I hope that's help :)