作业帮先化简在求值：(-1/3XY)²×[xy(2x-y)-2x(xy-y)²],其中X=-3/2,Y=2.
来源：学生作业帮助网 编辑：作业帮 时间：2024/07/20 06:48:04
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先化简在求值：(-1/3XY)²×[xy(2x-y)-2x(xy-y)²],其中X=-3/2,Y=2.
先化简在求值：(-1/3XY)²×[xy(2x-y)-2x(xy-y)²],其中X=-3/2,Y=2.
先化简在求值：(-1/3XY)²×[xy(2x-y)-2x(xy-y)²],其中X=-3/2,Y=2.
1/9x2y2 X （2x2y-xy2-2x2y+2xy2）
1/9x2y2 X xy2
(-1/3XY)²×[xy(2x-y)-2x(xy-y)²],
=1/9x²y²*(2x²y-xy²-2x²y+2xy²)
=1/9x²y²*xy²
=1/9x³y^4
=1/9x(-3/2)³x(-2)^4
=-1/9x27/8x16
=-6