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Mathematics 20 Online
OpenStudy (anonymous):

factor 42a-a^3+a^2

OpenStudy (anonymous):

I no that i can pull the a out

OpenStudy (zzr0ck3r):

\[-a(-a^2+a+42)\text{ we want two numbers that multiply to 42 and add to 1}\\\text{ two such numbers are -6 and 7}\\so\\a(-a^2-6a+7a+42)\\a(-a(a+6)+7(a+6))\\a(a+6)(7-a)\]

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