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OpenStudy (anonymous):
x^2-3x-40
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Directrix (directrix):
If you want to factor x^2-3x-40, then find two integers that multiply to -40 and add to -3. x^2-3x-40 = x^2 - 8x + 5x -40 = x(x - 8) + 5(x - 8) = (x - 8) (x + ? ) @makisha
OpenStudy (anonymous):
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