问一道初一的数学题;(m-x)(-x)(-n)=5x+x^2-6对任意数x都成立,求m(n-1)+n(m+1)的值,必须在1天内给我答复,111解释一下x^2的意思是X的2次方,对不器,有一个地方错了,是;(m-x)(-x)-(x+m)(-n)=5x+x^2-6对任意数x都成
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![问一道初一的数学题;(m-x)(-x)(-n)=5x+x^2-6对任意数x都成立,求m(n-1)+n(m+1)的值,必须在1天内给我答复,111解释一下x^2的意思是X的2次方,对不器,有一个地方错了,是;(m-x)(-x)-(x+m)(-n)=5x+x^2-6对任意数x都成](/uploads/image/z/1681951-31-1.jpg?t=%E9%97%AE%E4%B8%80%E9%81%93%E5%88%9D%E4%B8%80%E7%9A%84%E6%95%B0%E5%AD%A6%E9%A2%98%3B%28m-x%29%28-x%29%28-n%29%3D5x%2Bx%5E2-6%E5%AF%B9%E4%BB%BB%E6%84%8F%E6%95%B0x%E9%83%BD%E6%88%90%E7%AB%8B%2C%E6%B1%82m%28n-1%29%2Bn%28m%2B1%29%E7%9A%84%E5%80%BC%2C%E5%BF%85%E9%A1%BB%E5%9C%A81%E5%A4%A9%E5%86%85%E7%BB%99%E6%88%91%E7%AD%94%E5%A4%8D%2C111%E8%A7%A3%E9%87%8A%E4%B8%80%E4%B8%8Bx%5E2%E7%9A%84%E6%84%8F%E6%80%9D%E6%98%AFX%E7%9A%842%E6%AC%A1%E6%96%B9%2C%E5%AF%B9%E4%B8%8D%E5%99%A8%2C%E6%9C%89%E4%B8%80%E4%B8%AA%E5%9C%B0%E6%96%B9%E9%94%99%E4%BA%86%2C%E6%98%AF%3B%28m-x%29%28-x%29-%28x%2Bm%29%28-n%29%3D5x%2Bx%5E2-6%E5%AF%B9%E4%BB%BB%E6%84%8F%E6%95%B0x%E9%83%BD%E6%88%90)
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