2(x-3)平方=3(x-1)(x+1)-(x+1)平方
2(x^2-6x+9)=3(x^2-1)-(x^2+2x+1)
2x^2-12x+18=3x^2-3-x^2-2x-1
-12x+2x=-18-4
-10x=-22
x=2.2