1/(x-3)^2+1/2(x+3)+x/(3-x)(3+x)=0去分母,两边同时乘以2(x-3)^2(x+3), 得:2(x+3)+ (x-3)^2-2x(x-3)=02x+6+x^2-6x+9-2x^2+6x=0-x^2+2x+15=0(x-5)(x+3)=0x=5, -3(增根,舍去)因此只有一个解x=5
