被除式为12xy-10xy²,商式为-4xy余式为2xy²,求除式.

被除式为12xy-10xy²,商式为-4xy余式为2xy²,求除式.
被除式为12xy-10xy²,商式为-4xy余式为2xy²,求除式.

被除式为12xy-10xy²,商式为-4xy余式为2xy²,求除式.
除式=(被除式-余式)÷商
=(12xy-10xy²-2xy²)/(-4xy)
=(12xy-12xy²)/(-4xy)
=-3+3y
=3y-3

-3+2y^(x-1)

除式=（12xy-10xy²-2xy²)÷(-4xy)
=(12xy-12xy²)÷(-4xy)
=3y-3

3-2Y

-48x^2y^2+64x^2y^3-20x^2y^4=x^2(64y^3-48y^2-20y^4)