Question 1206053
(6-a-a^2)/(a^2-4)


(6-3a+2a-a^2)/(a+2)(a-2)


(3(2-a)+a(2-a))/(a+2)(a-2)


(3+a)(2-a)/(a+2)(a-2)

Bring the negative sign out and change sign of (2-a) to (a-2)


-(3+a)(a-2)/(a+2)(a-2) Cancel off (a-2)


-(3+a)/(a+2)