Question

Which of the following are solutions to the equation below? X^2-64=0

Answer 1

A & C

Explanation:

We can take 64 to the other side and then take the square root to find x. Steps shown below:

`x^2-64=0\\x^2=64\\x=+-√(64) \\x=8, -8`

Note: we take both the negative and positive values of 8, since both works!

`(8)^2-64=0\\64-64=0\\TRUE`

and

`(-8)^2-64=0\\64-64=0\\TRUE`

So the answers are 8 AND -8

Answer choices A and C.