两边约去3,得:
9(x-1)²=4(x+1)²
移项得:9(x-1)²-4(x+1)²=0
平方差:[3(x-1)+2(x+1)]*[3(x-1)-2(x+1)]=0
化简:(5x-1)(x-5)=0
x1=1/5,x2=5
如果不懂,请Hi我,