Question

X-2分之X-1=X方-4分之1求过程

Answer 1

两边同时乘以(x^2-4):

(x-1)/(x-2)=1/(x²-4)

(x-1)(x+2)=1

x²+x-3=0

x1=(-1-√13)/2,x2=(-1+√13)/2

经检验：x1,x2都是方程的根