-2x²y(3xy²z-2y²z)

问题描述:

-2x²y(3xy²z-2y²z)
=
(ab²c)²÷(ab³c²)
=
(2x²-3xy+4y²)(-xy)
=

-2x²y(3xy²z-2y²z)=-6x³y³z+4x²y³z(ab²c)²÷(ab³c²)=a²b^4c²÷ab³c²=ab(2x²-3xy+4y²)(-xy)=-2x³y+3x²y²...