1)
=(а+6-3)/3(а+3) ×3/(а-3)-6/(а-3)(а+3)=
=(а+3)/3(а+3) ×3/(а-3) -6/(а-3)(а+3)=
=1/3× 3/(а-3) -6/(а-3)(а+3)=
=1/(а-3) -6/(а-3)(а+3)=
=(а+3-6)/(а-3)(а+3)=(а-3)/(а-3)(а+3)=
=1/(а+3)=1/(-1/4+3)=1/(-2 3/4)=
=1/(-11/4)=-4/11
2)
=((х^2-16-х^2-4)/(х+4))^2 ×
×(х+4)^2/32=
=(-20/(х+4))^2×(х+4)^2/32=
=400/32=12.5