已知1/a-1/b=3,求代数式2a+3ab-2b/a-2ab-b的值

已知1/a-1/b=3,求代数式2a+3ab-2b/a-2ab-b的值
已知1/a-1/b=3,求代数式2a+3ab-2b/a-2ab-b的值

已知1/a-1/b=3,求代数式2a+3ab-2b/a-2ab-b的值
1/a-1/b=3,b-a=3ab ,(2a+3ab-2b)/(a-2ab-b)=(-6ab+3ab)/-3ab-2ab)=3/5

0.6

1/a-1/b=3.(b-a)/ab=3.b-a=3ab a-b=-3ab
代数式(2a+3ab-2b)/(a-2ab-b)=(-6ab+3ab)/-3ab-2ab)=3/5