Solve.For f(x) = (x + 5)(x - 6)(x - 9), find all x-values for which f(x) > 0.
A. (-?, -5) ? (6, 9) or {x|x < -5 or 6 < x < 9}
B. (-5, 6) ? (9, ?) or {x|-5 < x < 6 or x > 9}
C. (-?, 6) or {x| x < 6}
D. (9, ?) or {x|x > 9}
Answer: B
Mathematics
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