计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
来源:学生作业帮 编辑:大师作文网作业帮 分类:数学作业 时间:2024/11/10 10:31:47
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
-x^y^7+y^8)(
这里有问题,x的几次方?
再问: 就是一次方
再答: (x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-xy^7+y^8)(x^2+xy+y^2) =(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)x^2+(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)xy+(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)y^2 =(x^10-x^9y+x^7y^3-x^6y^4+x^5y^5-x^3y^7+x^2y^8)+(x^9y-x^8y^2+x^6y^4-x^5y^5+x^4y^6-x^2y^8+xy^9)+(x^8y^2-x^7y^3+x^5y^5-x^4y^6+x^3y^7-xy^9+y^10) =x^10+x^5y^5+y^10
这里有问题,x的几次方?
再问: 就是一次方
再答: (x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-xy^7+y^8)(x^2+xy+y^2) =(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)x^2+(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)xy+(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)y^2 =(x^10-x^9y+x^7y^3-x^6y^4+x^5y^5-x^3y^7+x^2y^8)+(x^9y-x^8y^2+x^6y^4-x^5y^5+x^4y^6-x^2y^8+xy^9)+(x^8y^2-x^7y^3+x^5y^5-x^4y^6+x^3y^7-xy^9+y^10) =x^10+x^5y^5+y^10
计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2)
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