3/(x－4)－24/x平方－16化简,
人气：312 ℃ 时间：2019-12-17 16:06:38
解答
3/(x－4)－24/(x^2－16)
={3(x+4)-24}/(x-4)(x+4)
=(3x-12)/(x-4)(x+4)
=3(x-4)/(x-4)(x+4)
=3/(x+4)
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