SOLUTION: Solve x^2 - 80 = 0 Thank You!

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Question 48134: Solve


x^2 - 80 = 0
Thank You!


Found 2 solutions by stanbon, Earlsdon:
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
x^2 - 80 = 0
(x-4sqrt5)(x+4sqrt5)=0
x=4sqrt5 or a=-4sqrt5
Cheers,
Stan H.

Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Solve:
x%5E2-80+=+0 First add 80 to both sides of the equation.
x%5E2+=+80 Now take the square root of both sides.
x+=+sqrt%2880%29 or x+=+-sqrt%2880%29 Simplify.
sqrt%2880%29+=+sqrt%285%2A16%29= 4sqrt%285%29
So:
x+=+4sqrt%285%29 or x+=+-4sqrt%285%29