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OpenStudy (anonymous):
Factor the following polynomial: x2 – 3x – 40
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OpenStudy (anonymous):
8 and 5.
OpenStudy (anonymous):
how did you get that?
OpenStudy (anonymous):
(x – 8)(x + 5)
OpenStudy (stamp):
\[x^2-3x-40\] c = 8 * 5, 10 * 4, 20 * 2, 40 * 1 What +/- combination obtains b = - 3? +/- 8 +/5 works. -8 +5 = -3 (x - 8) (x + 5)
OpenStudy (anonymous):
thank you!
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OpenStudy (stamp):
Check (x-8)(x+5) x(x+5)-8(x+5) xx + 5x -8x- 40 xx -3x -40 x^2 - 3x - 40
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