(x的平方-5x+6)分之(x的平方-1)-(x-3)分之2x=(2-x)分之x
[ (x²-1) - 2x(x-2) ]/ [/(x-2)(x-3)]=x/(2-x)
x²-4x+1=x(x-3)
-4x+1=-3x
x=1