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OpenStudy (anonymous):
how do you solve x2 + 9x+20=0 by factoring?
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OpenStudy (xguardians):
(x+4)(x+5)?
OpenStudy (anonymous):
(x+4)(x+5) = 0 Yea !
OpenStudy (xguardians):
Little trick I learned was that the outers of the parenthesis must equal the middle, and they must multiply to be the last number. In this case 4+5 = 9, and 4*5 = 20.
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