x^2-2x+1-a(x^2-1)=0(a为常数)解方程,

问题描述:

x^2-2x+1-a(x^2-1)=0(a为常数)解方程,

x^2-2x+1-a(x^2-1)=0
(x-1)^2-a(x-1)(x+1)=0
(x-1)[(x-1)-a(x+1)]=0
(x-1)[x-1-ax-a]=0
(x-1)[x-ax-1-a]=0
(x-1)[x(1-a)-(1+a)]=0
x1=1
x2=(1+a)/(1-a)