(x+3)/(x²-3x)+2/(3-x)=0
(x+3)/[x(x-3)]-2/(x-3)=0
两边同乘以x(x-3)
(x+3)-2x=0
x+3-2x=0
x=3
应为x-3为分母,x≠3
∴x=3为增根,方程无解,