18a^2b(b-a)/24ab^2(a-b)=
(a^2+4a+4)/(4-a^2)=
(4a^2-6ab)/(4a^2-12ab+9b^2)=
(2-18a^4)/(6a^2b^2-2b^2)=
18a^2b(b-a)/24ab^2(a-b)=
(a^2+4a+4)/(4-a^2)=
(4a^2-6ab)/(4a^2-12ab+9b^2)=
(2-18a^4)/(6a^2b^2-2b^2)=
1,18a^2b(b-a)/24ab^2(a-b)=-3a^2b/4ab^2=3a/4b
2,(a^2+4a+4)/(4-a^2)=-(a+2)^2/(a+2)(a-2)=-(a+2)/(a-2)
3,(4a^2-6ab)/(4a^2-12ab+9b^2)=2a(2a-3b)/(2a-3b)^2=2a/(2a-3b)
4,(2-18a^4)/(6a^2b^2-2b^2)=-(3a-1)(3a+1)(9a+1)/(3a^2-1)b^2=-(9a+1)/b^2
1.-(3a)/(4b)
2.(a+2)/(2-a)
3.(2a)/(2a-3b)
4.-(3a^2+1)/(b^2)
18a^2b(b-a)/24ab^2(a-b)=-3a/4b
(a^2+4a+4)/(4-a^2)=(a+2)/(2-a)
(4a^2-6ab)/(4a^2-12ab+9b^2)=2a/(2a-3b)
(2-18a^4)/(6a^2b^2-2b^2)
=(1-9a^4)/(3a^2b^2-b^2)
=(1-3a²)(1+3a²)/[b²(3a²-1)]
=-(1+3a²)/b²