3/(x-4)-24/x平方-16化简,
人气:463 ℃ 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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