题目

1.(-1/2x^2*y^3)*2^4*x^5*y^5
2.(x-y)^3*(y-x)^2*(y-x)^5
3.8*2^3*32*(-2)^8

提问时间：2020-07-06

答案

1.原式=-(1/2×2^4)×(x^2×x^5)×(y^3×y^5)
=-2^3×x^7×y^8
=-8x^7y^8
2.原式=(x-y)^3×(x-y)^2×[-(x-y)^5]
=-(x-y)^3×(x-y)^2×(x-y)^5
=-(x-y)^10
3.原式=2^3×2^3×2^5×2^8
=2^(3+3+5+8)
=2^19