整式的乘除,化简计算,1.-4x^3y*(1/2xy^2- 3xy)2.(x-y)^2-x(x-2y)

分类: 作业答案 • 2022-07-14 17:02:36

问题描述：

整式的乘除,化简计算,
1.-4x^3y*(1/2xy^2- 3xy)
2.(x-y)^2-x(x-2y)

答

1.-4x^3y*(1/2xy^2- 3xy)
=-2x^4y^3+12x^4y^2
2.(x-y)^2-x(x-2y)
=x^2-2xy+y^2-x^2+2xy
=y^2