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OpenStudy (anonymous):
Factor trinomial a^2+9a+20 I got (a+5)(a+4) Check please
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OpenStudy (anonymous):
yeah that's right multiply it back out to check: (a+5)(a+4)=a^2+4a+5a+20=a^2+9a+20
OpenStudy (amistre64):
5(4) = 20 5+4 = 9 ... youre good :)
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