x-1分之x的平方-10x+25除x的平方-1分之5-x
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![x-1分之x的平方-10x+25除x的平方-1分之5-x](/uploads/image/z/1634818-58-8.jpg?t=x-1%E5%88%86%E4%B9%8Bx%E7%9A%84%E5%B9%B3%E6%96%B9-10x%2B25%E9%99%A4x%E7%9A%84%E5%B9%B3%E6%96%B9-1%E5%88%86%E4%B9%8B5-x)
x-1分之x的平方-10x+25除x的平方-1分之5-x
x-1分之x的平方-10x+25除x的平方-1分之5-x
x-1分之x的平方-10x+25除x的平方-1分之5-x
(x²-10x+25)/(x-1)÷(5-x)/(x²-1)
=(x²-10x+25)/(x-1)*(x²-1)/(5-x)
=-(x-5)²/(x-1)*(x-1)(x+1)/(x-5)
=-(x-5)(x+1)