-2x²y(3xy²z-2y²z)=(ab²c)²÷(ab³c²)=(2x²-3xy+4y²)(-xy)=
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-2x²y(3xy²z-2y²z)=(ab²c)²÷(ab³c²)=(2x²-3xy+4y²)(-xy)=-2
-2x²y(3xy²z-2y²z)=(ab²c)²÷(ab³c²)=(2x²-3xy+4y²)(-xy)=
-2x²y(3xy²z-2y²z)
=
(ab²c)²÷(ab³c²)
=
(2x²-3xy+4y²)(-xy)
=
-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+3x²y²-4xy³