SOLUTION: complete the square write it as a trinomial or polynomial x^2+2x x(x+2)

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Question 337675: complete the square write it as a trinomial or polynomial
x^2+2x
x(x+2)
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
x%5E2%2B2x
To complete the square take (1%2F2) of the x coefficient, square it, then add and subtract this value to the expression.
%281%2F2%29%282%29=1
1%5E2=1
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x%5E2%2B2x=x%5E2%2B2x%2B1-1
x%5E2%2B2x=%28x%5E2%2B2x%2B1%29-1
x%5E2%2B2x=%28x%2B1%29%5E2-1