1
1)(a+2)/(a²-2a+1):(a²-4)/(3a-3)=(a+2)/(a-1)² *3(a+1)/(a-2)(a+2)=3/(a-1)(a-2)
2)3/(a-1)(a-2)-3/(a-2)=3(1-a+1)/(a-2)(a-1)=3(2-a)/(a-2)(a-1)=-3/(a-1)=3/(1-a)
2
1)(b-3)/(b+3)+(b+3)/(b-3)=(b²-6b+9+b²+6b+9)/(b²-9)=(2b²+18)/(b²-9)=
=2(b²+9)/(b²-9)
2)b(b+3)/b(b²+9) *2(b²+9)/(b+3)(b-3)=2/(b-3)