帮我把下面这几道初二计算题算出来,一定要有过程 .有急用.(x+1)(x2-x+1); (x-y)(x2-xy+y2);上面只有两道题,x后面那一个数字是次方哦,例如(x3+x2+x+1)是x的立方加x的平方加x加1.本
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/04 22:22:24
![帮我把下面这几道初二计算题算出来,一定要有过程 .有急用.(x+1)(x2-x+1); (x-y)(x2-xy+y2);上面只有两道题,x后面那一个数字是次方哦,例如(x3+x2+x+1)是x的立方加x的平方加x加1.本](/uploads/image/z/7150161-57-1.jpg?t=%E5%B8%AE%E6%88%91%E6%8A%8A%E4%B8%8B%E9%9D%A2%E8%BF%99%E5%87%A0%E9%81%93%E5%88%9D%E4%BA%8C%E8%AE%A1%E7%AE%97%E9%A2%98%E7%AE%97%E5%87%BA%E6%9D%A5%2C%E4%B8%80%E5%AE%9A%E8%A6%81%E6%9C%89%E8%BF%87%E7%A8%8B+.%E6%9C%89%E6%80%A5%E7%94%A8.%EF%BC%88x%2B1%EF%BC%89%EF%BC%88x2-x%2B1%EF%BC%89%EF%BC%9B+%EF%BC%88x-y%EF%BC%89%EF%BC%88x2-xy%2By2%EF%BC%89%EF%BC%9B%E4%B8%8A%E9%9D%A2%E5%8F%AA%E6%9C%89%E4%B8%A4%E9%81%93%E9%A2%98%EF%BC%8Cx%E5%90%8E%E9%9D%A2%E9%82%A3%E4%B8%80%E4%B8%AA%E6%95%B0%E5%AD%97%E6%98%AF%E6%AC%A1%E6%96%B9%E5%93%A6%EF%BC%8C%E4%BE%8B%E5%A6%82%EF%BC%88x3%2Bx2%2Bx%2B1%EF%BC%89%E6%98%AFx%E7%9A%84%E7%AB%8B%E6%96%B9%E5%8A%A0x%E7%9A%84%E5%B9%B3%E6%96%B9%E5%8A%A0x%E5%8A%A01.%E6%9C%AC)
帮我把下面这几道初二计算题算出来,一定要有过程 .有急用.(x+1)(x2-x+1); (x-y)(x2-xy+y2);上面只有两道题,x后面那一个数字是次方哦,例如(x3+x2+x+1)是x的立方加x的平方加x加1.本
帮我把下面这几道初二计算题算出来,一定要有过程 .有急用.(x+1)(x2-x+1); (x-y)(x2-xy+y2);
上面只有两道题,x后面那一个数字是次方哦,例如(x3+x2+x+1)是x的立方加x的平方加x加1.本来是打的是正确立方,各位看得懂就行了。
帮我把下面这几道初二计算题算出来,一定要有过程 .有急用.(x+1)(x2-x+1); (x-y)(x2-xy+y2);上面只有两道题,x后面那一个数字是次方哦,例如(x3+x2+x+1)是x的立方加x的平方加x加1.本
(x+1)(x2-x+1)
=x³-1
(x-y)(x2-xy+y2)
=x³-x²y+xy²-x²y+xy²-y³
=x³-2x²y+2xy²-y³
(x+1)(x2-x+1)
= x3 - x2 + x + x2 - x +1
= x3 + 1
(x-y)(x2-xy+y2)
= x3 - x2y + xy2 - x2y + xy2 - y3
= x3 - 2x2y + 2xy2 - y3
(x+1)(x2-x+1)
=(x3-x2+x)+(x2-x+1)
=x3+1; 【ps:那个3是3次方哦】
(x-y)(x2-xy+y2)
=x³-x²y+xy²-x²y+xy²-y³
=x³-2x²y+2xy²-y³
纯手打哦 记得采纳~
...
全部展开
(x+1)(x2-x+1)
=(x3-x2+x)+(x2-x+1)
=x3+1; 【ps:那个3是3次方哦】
(x-y)(x2-xy+y2)
=x³-x²y+xy²-x²y+xy²-y³
=x³-2x²y+2xy²-y³
纯手打哦 记得采纳~
我也是初二学生
有什么不懂的我们可以一起交流哈
收起