Question 217753
12a^3-9a^2+4a-3
3a^2(4a-3) + (4a-3)
= (4a-3)(3a^2+1)
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2p^3+5p^2+6p+15
Rearrange:
2p^3 + 6p + 5p^2+15
2p(p^2+3) + 4(p^2+3)
(p^2+3)(2p+4)
2(p+2)(p^2+3)

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Cheers,
Stan H.