化简求值(0.2x^3-x^2y-xy^2)-(xy^2-x^2y-0.5x^3)+0.3x^3其中x=-3y=-2
2个回答
原式=0.2x^3-x^2y-xy^2-xy^2+x^2y+0.5x^3+0.3x^3
=x^3+(-2xy^2)
当x=-3,y=-2时,原式=-27+24=-3
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