(x+1- __1_)÷(x- x² )
1-x x-1
=(x+1+ _1___)÷(x- x² )
x-1 x-1
=(x²-1+ 1__)÷(x² -x - x² )
x-1 x-1 x-1 x-1
=( x²-1+1)÷(x² -x - x² )
x-1 x-1
=( x² )÷( -x )
x-1 x-1
=( x² )×( x-1 )
x-1 -x
=-x
(x+1- __1_)÷(x- x² )
1-x x-1
=(x+1+ _1___)÷(x- x² )
x-1 x-1
=(x²-1+ 1__)÷(x² -x - x² )
x-1 x-1 x-1 x-1
=( x²-1+1)÷(x² -x - x² )
x-1 x-1
=( x² )÷( -x )
x-1 x-1
=( x² )×( x-1 )
x-1 -x
=-x