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OpenStudy (anonymous):
The sum of a negative number and its square is 72. Find the number. -8 -9 9 8
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OpenStudy (anonymous):
x^2 + x = 72 x^2 + x - 72 = 0 (x + 9)(x - 8) = 0 x = -9 and 8 Since the number has to be negative, it is -9.
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