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Mathematics 16 Online
OpenStudy (anonymous):

What polynomial has roots of -5, 2, and 4 ? x3 - x2 - 22x + 40 x3 + x2 - 22x - 40 x3 + 3x2 - 18x - 40 x3 - 3x2 - 18x + 40

Directrix (directrix):

x3 - x2 - 22x + 40 http://www.wolframalpha.com/input/?i=%28x%2B5%29%28x-2%29%28x-4%29%3D

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