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OpenStudy (anonymous):
Factor completely: 2a2 + a − 28
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OpenStudy (anonymous):
i believe the answer is (2a-7)(a+4) but just checking my work. Need to raise my grade badly.
OpenStudy (jackellyn):
Well, let's check your work. Using FOIL (FIRST OUTSIDE INSIDE LAST) expand your answer. (2a-7)(a+4) 2a(a) + 2a(4) + (-7)(a) + (-7)(4) 2a^2 + 8a -7a - 28 Combine like terms 2a^2 + a -28 which is the original equation, good job @flowmaster1776
OpenStudy (anonymous):
thanks!
OpenStudy (jackellyn):
no problem :)
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