(x^4乘x^3乘x^2)减(2x^4乘x^5加x^2乘x^7减3x^9)

比仨适当的2022-10-04 11:39:544条回答

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liuyulin1 共回答了22个问题 | 采纳率86.4%: (x^4乘x^3乘x^2)减(2x^4乘x^5加x^2乘x^7减3x^9)
=(x^4*x^3*x^2)-(2x^4*x^5+x^2*x^7-3x^9)
=(x^(2+3+4))-(2x^(4+5)+x^(2+7)-3x^9)
=x^9-(2x^9+x^9-3x^9)
=x^9-(3x^9-3x^9)
=x^9-0
=x^9; 1年前

c6mlkka5 共回答了1个问题 | 采纳率: x^9-x^9 x^9-3x^9=-2x^9; 1年前

透明雨177 共回答了288个问题 | 采纳率: =x^(4+3+2)-(2x^(4+5)+x^(2+7)-3x^9)
=x^9-(0)
=x^9; 1年前

君子兰166 共回答了2个问题 | 采纳率: 等于 X^9-2X^9+X^9-3X^9=-3X^9; 1年前

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