试说明x^3y^3-1/2x^2y+y^2-2x^3y^3+0.5x^2y+y^2+x^3y^3-2y^3-3的值与x取值无关_数学解答

试说明x^3y^3-1/2x^2y+y^2-2x^3y^3+0.5x^2y+y^2+x^3y^3-2y^3-3的值与x取值无关

人气：250 ℃　时间：2019-08-19 12:47:27

解答

合并同类项后,原式=-3,当然与x取值无关
x³y³-1/2x²y+y²-2x³y³+0.5x²y+y²+x³y³-2y³-3
=x³y³-2x³y³+x³y³-1/2x²y+0.5x²y+y²+y²-2y³-3
=-3