计算题 (6/x - x +1)(3/(x-3) +1)

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计算题(6/x-x+1)(3/(x-3)+1)计算题(6/x-x+1)(3/(x-3)+1)计算题(6/x-x+1)(3/(x-3)+1)(6/x-x+1)(3/(x-3)+1)=(6/x-x^/x+

计算题 (6/x - x +1)(3/(x-3) +1)
计算题 (6/x - x +1)(3/(x-3) +1)

计算题 (6/x - x +1)(3/(x-3) +1)
(6/x-x+1)(3/(x-3)+1)
=(6/x-x^/x+x/x)(3/(x-3)+(x-3)/(x-3)) 分母相同, ^是平方
=((6-x^+x)/x)(x/(x-3)) 计算分子
=((6-x^+x)/x)(x/(x-3))
=((3-x)(2+x)/x)(x/(x-3))
=-2-x