a^2-6a+9+|b-1|=0
(a-3)^2+|b-1|=0
a-3=0
b-1=0
a=3
b=1
(a/b-b/a)÷(a+b)*ab
=[(a^2-b^2)/ab]÷(a+b)*ab
=(a+b)(a-b)÷(a+b)
=a-b
=3-1
=2