Answer:
A & C
Step-by-step explanation:
We can take 64 to the other side and then take the square root to find x. Steps shown below:
[tex]x^2-64=0\\x^2=64\\x=+-\sqrt{64} \\x=8, -8[/tex]
Note: we take both the negative and positive values of 8, since both works!
[tex](8)^2-64=0\\64-64=0\\TRUE[/tex]
and
[tex](-8)^2-64=0\\64-64=0\\TRUE[/tex]
So the answers are 8 AND -8
Answer choices A and C.
