Precalculus
posted by Isis .
1) What is the equivalent of this?
5x(2x+7y)+7xy4x(y+3)

Precalculus 
Reiny
just expand, then collect like terms
= 10x^2  35xy + 7xy  4xy  12x
= 10x^2 32xy  12x
or
= 2(5x^2 + 16xy + 6x)
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