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1÷(5X+4)-1÷(6X-5)=1÷(4X+5)-1÷(5X+4)
人气:439 ℃ 时间:2020-04-13 17:34:28
解答
1÷(5X+4)-1÷(6X-5)=1÷(4X+5)-1÷(5X+4)1/(5X+4)-1/(6X-5)=1/(4X+5)-1/(5X+4)2/(5X+4)=1/(4X+5)+1/(6X-5)2/(5X+4)=(6X-5+4X+5)/(4X+5)(6X-5)2/(5X+4)=10X/(4X+5)(6X-5)10X(5X+4)=2(4X+5)(6X-5)50X^2+40X=48X^2...
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