问题标题:
分式的加减法计算(要过程)(1)3a+2b5a²b+a+b5a²b-b-a5a²b(2)m+2nn-m-nm-n+2mn-m(3)1a+3+6a²-9(4)1x-3+1-x6+2x-6x²-9
问题描述:

分式的加减法计算(要过程)

(1)3a+2b5a²b+a+b5a²b-b-a5a²b(2)m+2nn-m-nm-n+2mn-m

(3)1a+3+6a²-9(4)1x-3+1-x6+2x-6x²-9

荆献勇回答:
  1.原式=(3a+2b+a+b-b+a)/5a²b=(5a+2b)/3a²b   2.原式=(m+2n+n+2m)/n-m=3(m+n)/(n-m)   3.原式=(a-3)/(a-3)(a+3)+6/(a-3)(a+3)=(a-3+6)/(a-3)(a+3)=(a+3)/(a-3)(a+3)=1/(a-3)   4.原式=(x+3)/(x+3)(x-3)+(0.5-0.5x)(x-3)/(x+3)(x-3)-6/(x+3)(x-3)=-(x-3)(x-3)/2(x+3)(x-3)=-(x-3)/2(x+3)
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