81(x+y)²-121(m+n)² (x²+y²)²-x²y² (2m-n)²-(3m+2n)² 因式越快越好,我明天要交的。
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/03 14:14:38
![81(x+y)²-121(m+n)² (x²+y²)²-x²y² (2m-n)²-(3m+2n)² 因式越快越好,我明天要交的。](/uploads/image/z/1124193-57-3.jpg?t=81%28x%2By%29%26%23178%3B-121%28m%2Bn%29%26%23178%3B+%28x%26%23178%3B%2By%26%23178%3B%29%26%23178%3B-x%26%23178%3By%26%23178%3B+%282m-n%29%26%23178%3B-%283m%2B2n%29%26%23178%3B+%E5%9B%A0%E5%BC%8F%E8%B6%8A%E5%BF%AB%E8%B6%8A%E5%A5%BD%EF%BC%8C%E6%88%91%E6%98%8E%E5%A4%A9%E8%A6%81%E4%BA%A4%E7%9A%84%E3%80%82)
x)0ԨЮTS64542r4* J
S)3Յ06t{_lz5\g{deOv-y>qCMR>}\(' }òB۲R045\m WAm**JabHbCq,
usul[]
S^0M 1 מ
81(x+y)²-121(m+n)² (x²+y²)²-x²y² (2m-n)²-(3m+2n)² 因式越快越好,我明天要交的。
81(x+y)²-121(m+n)² (x²+y²)²-x²y² (2m-n)²-(3m+2n)² 因式
越快越好,我明天要交的。
81(x+y)²-121(m+n)² (x²+y²)²-x²y² (2m-n)²-(3m+2n)² 因式越快越好,我明天要交的。
81(x+y)²-121(m+n)² =(9x+9y-11m-11n)(9x+9y+11m+11n)
(x²+y²)²-x²y² =(x²+xy+y²)(x²-xy+y²)
(2m-n)²-(3m+2n)²=(2m-n+3m+2n)(2m-n-3m-2n)=-(5m+n) (m+3n)