紧急!(X-Y)^3*(X-Y)^2*(Y-X)(X-Y)^3*(X-Y)^2*(Y-X)得数是(X-Y)*(Y-X)吗?如果不是..

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紧急!(X-Y)^3*(X-Y)^2*(Y-X)(X-Y)^3*(X-Y)^2*(Y-X)得数是(X-Y)*(Y-X)吗?如果不是..紧急!(X-Y)^3*(X-Y)^2*(Y-X)(X-Y)^3*(

紧急!(X-Y)^3*(X-Y)^2*(Y-X)(X-Y)^3*(X-Y)^2*(Y-X)得数是(X-Y)*(Y-X)吗?如果不是..
紧急!(X-Y)^3*(X-Y)^2*(Y-X)
(X-Y)^3*(X-Y)^2*(Y-X)
得数是(X-Y)*(Y-X)吗?如果不是..

紧急!(X-Y)^3*(X-Y)^2*(Y-X)(X-Y)^3*(X-Y)^2*(Y-X)得数是(X-Y)*(Y-X)吗?如果不是..
(X-Y)^3*(X-Y)^2*(Y-X)
=-(X-Y)^3*(X-Y)^2*(X-Y)
=-(X-Y)^(3+2+1)
=-(X-Y)^6

=(x-y)^3 * (x-y)^2 * [-(x-y)]
=-(x-y)^6

=-(y-x)^3×(y-x)^2×(y-x)
=-(y-x)^6