a-3 a __________________ — ___________________=a (во 2 степени) -4 (a-2) (во 2 степени)

(a-3) / (a^2-4)=a/ (a-2) ^2 (a-3) / (a-2) (a+2)=a/ (a-2) (a-2) (a-3) (a-2) -a (a+2) / (a-2) (a-2) (a+2)=0 (a-3) (a-2) -a (a+2)=0 и (a-2) (a-2) (a+2) не=0 (a не=2, -2) a^2-2a-3a+6-a^2-2a=0-7a+6=07a=6a=6/7