今晚就要.都是因式分解①-x平方y+8xy-15y=?②x的2n次方-5x的n次方-66=?③3的2m次方+3的m+2次方+四分之八十一=?④a的m+2次方+3a平方x-2a的m次方y-6xy=?⑤x的2n次方+6x的n次方-y的平方+9=?⑥(x的平方+x)平
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![今晚就要.都是因式分解①-x平方y+8xy-15y=?②x的2n次方-5x的n次方-66=?③3的2m次方+3的m+2次方+四分之八十一=?④a的m+2次方+3a平方x-2a的m次方y-6xy=?⑤x的2n次方+6x的n次方-y的平方+9=?⑥(x的平方+x)平](/uploads/image/z/8566092-36-2.jpg?t=%E4%BB%8A%E6%99%9A%E5%B0%B1%E8%A6%81.%E9%83%BD%E6%98%AF%E5%9B%A0%E5%BC%8F%E5%88%86%E8%A7%A3%E2%91%A0-x%E5%B9%B3%E6%96%B9y%2B8xy-15y%3D%3F%E2%91%A1x%E7%9A%842n%E6%AC%A1%E6%96%B9-5x%E7%9A%84n%E6%AC%A1%E6%96%B9-66%3D%3F%E2%91%A23%E7%9A%842m%E6%AC%A1%E6%96%B9%2B3%E7%9A%84m%2B2%E6%AC%A1%E6%96%B9%2B%E5%9B%9B%E5%88%86%E4%B9%8B%E5%85%AB%E5%8D%81%E4%B8%80%3D%3F%E2%91%A3a%E7%9A%84m%2B2%E6%AC%A1%E6%96%B9%2B3a%E5%B9%B3%E6%96%B9x-2a%E7%9A%84m%E6%AC%A1%E6%96%B9y-6xy%3D%3F%E2%91%A4x%E7%9A%842n%E6%AC%A1%E6%96%B9%2B6x%E7%9A%84n%E6%AC%A1%E6%96%B9-y%E7%9A%84%E5%B9%B3%E6%96%B9%2B9%3D%3F%E2%91%A5%EF%BC%88x%E7%9A%84%E5%B9%B3%E6%96%B9%2Bx%EF%BC%89%E5%B9%B3)
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