试说明代数式:—(3x²y+10x³)+3x³+6x³y+3x²y—(6x³y—7x³)—(3x²y+10x³)+3x³+6x³y+3x²y—(6x³y—7x³)的值与x,y都无关.

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试说明代数式:—(3x²y+10x³)+3x³+6x³y+3x²y—(6x³y—7x³)—(3x²y+10x³)+3x³+6x³y+3x²y—(6x³y—7x³)的值与x,y都无关.

试说明代数式:—(3x²y+10x³)+3x³+6x³y+3x²y—(6x³y—7x³)—(3x²y+10x³)+3x³+6x³y+3x²y—(6x³y—7x³)的值与x,y都无关.
试说明代数式:—(3x²y+10x³)+3x³+6x³y+3x²y—(6x³y—7x³)
—(3x²y+10x³)+3x³+6x³y+3x²y—(6x³y—7x³)的值与x,y都无关.

试说明代数式:—(3x²y+10x³)+3x³+6x³y+3x²y—(6x³y—7x³)—(3x²y+10x³)+3x³+6x³y+3x²y—(6x³y—7x³)的值与x,y都无关.
=—3x²y-10x³+3x³+6x³y+3x²y—6x³y+7x³
=-10x³+3x³+7x³
=0
因此:—(3x²y+10x³)+3x³+6x³y+3x²y—(6x³y—7x³)的值与x,y都无关

去括号展开,最后答案为0。所以与x y都无关!

:—(3x²y+10x³)+3x³+6x³y+3x²y—(6x³y—7x³)=0