Solve the equation by factoring.x2 + x - 72 = 0
A. {-8, 9}
B. {-9, -8}
C. {8, 9}
D. {-9, 8}
Answer: D
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A. 0 B. -1 C. 1 D. ?
Find the indicated sum.5 - 15 + 45 - 135 + 405 - ... + 5 ? (-3)13
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