化简求值,其中x=-1,y=-2(3x²y-2xy+xy²)-3(x²y-xy²-3分之2xy)

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化简求值,其中x=-1,y=-2(3x²y-2xy+xy²)-3(x²y-xy²-3分之2xy)

化简求值,其中x=-1,y=-2(3x²y-2xy+xy²)-3(x²y-xy²-3分之2xy)
化简求值,其中x=-1,y=-2
(3x²y-2xy+xy²)-3(x²y-xy²-3分之2xy)

化简求值,其中x=-1,y=-2(3x²y-2xy+xy²)-3(x²y-xy²-3分之2xy)
(3x²y-2xy+xy²)-3(x²y-xy²-3分之2xy)
=xy(3x-2+y)-xy(3x-3y-2)
=xy(3x-2+y-3x+3y+2)
=xy*4y
=(-1)*(-2)*4((-2)
=-16

(3x²y-2xy+xy²)-3(x²y-xy²-3分之2xy)
=3x²y-2xy+xy²-3x²y+3xy²+2xy
=4xy²
=4*(-1)*(-2)^2
=-16

(3x²y-2xy+xy²)-3(x²y-xy²-3分之2xy)
=3x²y-2xy+xy²-3x²y+3xy²+2xy
=4xy²
带入x=-1,y=-2
原式=4*(-1)*(-2)²=-4*4=-16