SOLUTION: evaluate the following expressions for x=-1, y=2 x-((y-1)^2)+2(x^2+2x)

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Question 52697: evaluate the following expressions for x=-1, y=2
x-((y-1)^2)+2(x^2+2x)
Answer by funmath(2933) About Me  (Show Source):
You can put this solution on YOUR website!
x-%28y-1%29%5E2%2B2%28x%5E2%2B2x%29
Substitute -1 in for x and 2 in for y. It helps to use parenthesese to keep the signs straight.
=%28-1%29-%28%282%29-1%29%5E2%2B2%28%28-1%29%5E2%2B2%28-1%29%29
=-1-%281%29%5E2%2B2%281-2%29
=-1-1%2B2%28-1%29
=-1-1-2
=-4