SOLUTION: I need to solve this equation by finding square roots. I don't really understand how to do the problem. I think the answer is 8.94427191, but I don't understand why. The problemis

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: I need to solve this equation by finding square roots. I don't really understand how to do the problem. I think the answer is 8.94427191, but I don't understand why. The problemis      Log On


   

Question 129675: I need to solve this equation by finding square roots. I don't really understand how to do the problem. I think the answer is 8.94427191, but I don't understand why. The problemis:
x^2+8=72
Please help me.
Answer by checkley71(8403) About Me  (Show Source):
You can put this solution on YOUR website!
X^2+8=72
X^2=72-8
X^2=64
X=SQRT64
X=8 ANSWER.
PROOF:
8^2+8=72
64+8=72
72=72