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OpenStudy (anonymous):
Factor 15a3 + 40a
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OpenStudy (unklerhaukus):
\[15a^3+40a=(3\times5\times a\times a \times a)+(2\times2\times2\times5\times a)\]\[=5a\left((3\times a \times a)+(2\times2\times2)\right)==5a(3a^2+8)\]
OpenStudy (anonymous):
thankss
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