把下列(1)(2)两个多项式按字母降幂排列,(3)(4)两个多项式按字母y升幂排列(1)x²-y²+2xy-3x³y(2)5x²y-7x³+3y³-1/2xy²-1(3)5-x³y^4+x^4y^2z-x²y²(4)x³
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把下列(1)(2)两个多项式按字母降幂排列,(3)(4)两个多项式按字母y升幂排列(1)x²-y²+2xy-3x³y(2)5x²y-7x³+3y³-1/2xy²-1(3)5-x³y^4+x^4y^2z-x²y²(4)x³
把下列(1)(2)两个多项式按字母降幂排列,(3)(4)两个多项式按字母y升幂排列
(1)x²-y²+2xy-3x³y
(2)5x²y-7x³+3y³-1/2xy²-1
(3)5-x³y^4+x^4y^2z-x²y²
(4)x³-y³-5x²y+3xy²-7
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把下列(1)(2)两个多项式按字母降幂排列,(3)(4)两个多项式按字母y升幂排列(1)x²-y²+2xy-3x³y(2)5x²y-7x³+3y³-1/2xy²-1(3)5-x³y^4+x^4y^2z-x²y²(4)x³
(1)x²-y²+2xy-3x³y
-3x³y+x²+2xy-y²
(2)5x²y-7x³+3y³-1/2xy²-1
-1-4y³-1/2xy²+5x²y
(3)5-x³y^4+x^4y^2z-x²y²
=5-x²y²+x^4y²z-x³y^4
(4)x³-y³-5x²y+3xy²-7
-7+x³-5x²y+3xy²-y³
(1)x²-y²+2xy-3x³y,按x降幂排列-3x^3y+x^2+2xy-y^2
(2)5x²y-7x³+3y³-1/2xy²-1,按x的降幂排列:-7x^3+5x^2y-1/2xy^2+3y^3-1
(3)5-x³y^4+x^4y^2z-x²y²,按y升幂排列:5+(x^4z-...
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(1)x²-y²+2xy-3x³y,按x降幂排列-3x^3y+x^2+2xy-y^2
(2)5x²y-7x³+3y³-1/2xy²-1,按x的降幂排列:-7x^3+5x^2y-1/2xy^2+3y^3-1
(3)5-x³y^4+x^4y^2z-x²y²,按y升幂排列:5+(x^4z-x^2)y^2-x^3y^4
(4)x³-y³-5x²y+3xy²-7,按y升幂排列:-7+x^3-5x^2y+3xy^2-y^3
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(1)按x降幂排列:-3x³y+x²+2xy-y²
(2)按x的降幂排列:-7x^3+5x^2y-1/2xy^2+3y^3-1
(3)按y升幂排列:5+(x^4z-x^2)y^2-x^3y^4
(4)按y升幂排列:-7+x³-5x²y+3xy²-y³
所谓按某字母降幂或升幂排列如x,就只需看x的...
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(1)按x降幂排列:-3x³y+x²+2xy-y²
(2)按x的降幂排列:-7x^3+5x^2y-1/2xy^2+3y^3-1
(3)按y升幂排列:5+(x^4z-x^2)y^2-x^3y^4
(4)按y升幂排列:-7+x³-5x²y+3xy²-y³
所谓按某字母降幂或升幂排列如x,就只需看x的指数幂,然后再按降序(从大到小)或升幂(从小到大)写,就ok啦!
这是多项式最基本的知识点,你一定要掌握好,我相信,它是难不倒你的,加油哈,嘿嘿
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