(3a-6b)/(a+b) - (5a-6b)/(a-b) - (4a-5b)/(a+b) - (7a-8b)/(a-b) 快_数学解答

(3a-6b)/(a+b) - (5a-6b)/(a-b) - (4a-5b)/(a+b) - (7a-8b)/(a-b)
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人气：283 ℃　时间：2020-03-25 22:52:17

解答

(3a-6b)/(a+b) - (5a-6b)/(a-b) - (4a-5b)/(a+b) - (7a-8b)/(a-b) =(3a-6b)/(a+b) - (4a-5b)/(a+b)- (5a-6b)/(a-b) - (7a-8b)/(a-b) =(3a-6b-4a+5b)/(a+b) - (5a-6b+7a-8b)/(a-b)=-(a+b)/(a+b) - (12a-14b)/(a-b)=-1...