X-Y-1分之X方-2XY+Y方-1 化简

问题描述:

X-Y-1分之X方-2XY+Y方-1 化简

(x^2-2xy+y^2-1)/(x-y-1)
=[(x-y)^2-1]/(x-y-1)
=(x-y+1)(x-y-1)/(x-y-1)
=x-y+1