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x的2次方-5x+6分之2x-5-x-3分之1
人气:114 ℃ 时间:2020-01-28 03:22:33
解答
=(2x-5)/(x-2)(x-3)-(x-2)/(x-3)(x-2)
=[(2x-5)-(x-2)]/(x-3)(x-2)
=(x-3)/(x-2)(x-3)
=1/(x-3)
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