SOLUTION: what is the sum of the squares of the roots of the equation x^2 + 2x = 80?

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Question 295699: what is the sum of the squares of the roots of the equation x^2 + 2x = 80?
Answer by nyc_function(2741) About Me  (Show Source):
You can put this solution on YOUR website!
Subtract 80 from both sides and set equation to zero.
x^2 + 2x = 80
x^2 + 2x - 80 = 0
Can you do it now?
Just factor the left side.
If you cannot factor, then use the quadratic formula or completing the square to find the value of x.