x+1-x2次方+2x/x+1 因式分解8

问题描述:

x+1-x2次方+2x/x+1 因式分解8

=(x+1)²/(x+1) -(x²+2x)/(x+1)
=[(x+1)²-(x²+2x)]/(x+1)
=1/(x+1)