SOLUTION: Find the integer such that four times the number subtracted from twice the square of the number makes 240.

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Question 983742: Find the integer such that four times the number subtracted from twice the square of the number makes 240.
Answer by macston(5194) About Me  (Show Source):
You can put this solution on YOUR website!
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x=the number
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2x%5E2-4x=240
2x%5E2-4x-240=0
x%5E2-2x-120=0
%28x-12%29%28x%2B10%29=0
x-12=0 OR x%2B10=0
x=12 OR x=-10
ANSWER: The integer can be -10 or 12.