Question

初二下册数学题：x²／x-1 －x的结果为？

x²是分母 x-1是分子

Answer 1

x²／(x-1) －x=x²／(x-1) －x(x-1)/(x-1)=x/(x-1)

Answer 2

=[(x+1)(x-1)+1]/(x-1) -x
=(x+1)+1/(x-1)-x
=1+1/(x-1)
=x/x-1 (x不等于1)