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OpenStudy (anonymous):
(5x^2-7y-9)-(8x^2-6y-2) what's the difference?
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OpenStudy (anonymous):
Group together the like terms. 5x^2 - 7y - 9 - 8x^2 + 6y + 2 = 5x^2 - 8x^2 - 7y + 6y - 9 + 2 = -3x^2 - y - 7
OpenStudy (anonymous):
i believe you can foil this equation, but instead of multiplying you subtract
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