(2x-y)^3×(2x-y)×(2x-y)^4

问题描述:

(2x-y)^3×(2x-y)×(2x-y)^4

(2x-y)^3×(2x-y)×(2x-y)^4
=(2x-y)^(3+1+4)
=(2x-y)^8若x^m=8,x^n=2,求x^m+n=8*2=16
采纳吧