Posted by Tifini on Sunday, July 15, 2012 at 11:00pm.
In this case it is just as easy to simply expand it
= (3x)^3 + 3(3x)^2 y + 3(3x)(y^2) + y^3
so we want the second last term which is
9xy^2
In this case it is just as easy to simply expand it
= (3x)^3 + 3(3x)^2 y + 3(3x)(y^2) + y^3
so we want the second last term which is
9xy^2
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