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

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

人气：260 ℃　时间：2020-05-29 09:33:27

解答

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