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

Question

asked Mar 28, 2020 74.0k views

1 Answer

Edward Anderson · Answer 1 · 2020-04-02T06:57:38+0000

Answer:

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.