Question 1199682
6-a-a^2 division a^2-4 is = -3+a division a+2
-----
(6-a-a^2)/(a^2-4) = (a-3)/(a+2)
{{{-(a+3)*(a-2)/((a-2)*(a+2)) = (a-3)/(a+2)}}}
{{{-(a+3)/(a+2) = (a-3)/(a+2)}}}
-a-3 = a-3
a = 0