Solve.For F(x) = x3 - 6x2 - 7x, find all x-values for which F(x) ? 0.
A. [7, ?) or {x|x > 7}
B. (-?, -1] or {x|x ? -1}
C. (-?, -1] ? [7, ?) or {x|x ? -1 or x > 7}
D. (-?, 7] or {x|x ? 7}
Answer: D
Mathematics
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