解析:
由题意可知x≠1且x≠-1,那么:
(x^2+2x+1)分之(x^2-1) - (x-1)分之(x+1)
=(x+1)²分之(x+1)(x-1) - (x-1)分之(x+1)
=(x+1)分之(x-1) - (x-1)分之(x+1)
=(x²-1)分之[(x-1)²-(x+1)²]
=(x²-1)分之[(x²-2x+1)-(x²+2x+1)]
=(x²-1)分之(-4x)
不妨取x=0,那么:
(x^2+2x+1)分之(x^2-1) - (x-1)分之(x+1)
=(x²-1)分之(-4x)
=0
若取x=2,那么:
(x^2+2x+1)分之(x^2-1) - (x-1)分之(x+1)
=(4-1)分之(-8)
=-3分之8