3x-y to the third
becomes
(x+x)+x-y*y*y
the question is (3x-y)3
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3xy - 3xy = 0
3xy and 2xy. You can see that 3xy and 2xy have something in common with each other. They both have xy and the end of them. Hope this helped.
4
3xy
-3xy is a monomial where x and y are variables and -3 is the coefficient of the monomial.If we know the value of y, we have to substitute it for y, and we say that -3(y-value) is the coefficient of x.