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