03princess03 B^2-b-6/9(b+2)=0
b не = -2
b^2+2b-3b-6/9(b+2)=0
b*(b+2)-3(b+2)/9(b+2)=0
(b-3)*(b+2)/9(b+2)=0
b-3/9=0
b-3=0
b=3
b не = -2