2+[(x+3)/(x-1)][(x²-2x+1)/(x²+6x+9)]=2+[(x+3)/(x-1)][(x-1)²/(x+3)²]=2+(x-1)/(x+3)=[2(x+3)+(x-1)]/(x+3)=(3x+5)/(x+3)请点击下面的【选为满意回答】按钮.