SOLUTION: this multiple choice is hard someone please help x^2+8=57 a. +-quare root 65 b. +-square root 57-8 c. +- 7 d. +- square root 57+8

Algebra ->  Coordinate Systems and Linear Equations -> SOLUTION: this multiple choice is hard someone please help x^2+8=57 a. +-quare root 65 b. +-square root 57-8 c. +- 7 d. +- square root 57+8       Log On


   

Question 103651: this multiple choice is hard someone please help
x^2+8=57
a. +-quare root 65
b. +-square root 57-8
c. +- 7
d. +- square root 57+8
Answer by TP(29) About Me  (Show Source):
You can put this solution on YOUR website!
x^2+8=57
Subtract 8 from each side
x^2=49
Square root both sides
x=+7 or -7.
So the answer is c.