SOLUTION: what is the square root of 4x^2+48x+144=400 how would I find that?

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Question 481286: what is the square root of 4x^2+48x+144=400 how would I find that?
Answer by jorel1380(2518) About Me  (Show Source):
You can put this solution on YOUR website!
4x^2+48x+144=400
4x2+48x-256=0
x2+12x-64=0
(x+16)(x-4)=0
x=-16 or 4..