约分x²-x/x²-1
问题描述:
约分x²-x/x²-1
答
x²-x/x²-1
x(x-1)/(x+1)(x-1)
=x/(x+1)
约分x²-x/x²-1
x²-x/x²-1
x(x-1)/(x+1)(x-1)
=x/(x+1)