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OpenStudy (anonymous):
(3m-15)-(5n+mn)
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OpenStudy (anonymous):
factor it
OpenStudy (anonymous):
I'm stuck here 3(m-5)-n(5+m)
OpenStudy (anonymous):
the (m-5) and (5+m) have to be the same
OpenStudy (anonymous):
group it in pairs 3m - 15 + mn - 5n look at the pairs (3m - 15) + (mn - 5n) take out common factors for both pairs and then you'll have an answer.
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