Question 337124
Factor the quadratic.
{{{x^2-1=(x-1)(x+1)}}}
Substitute,
{{{(x^2 - 1)/(x-1) - x = y}}}
{{{((x-1)(x+1))/(x-1) - x = y}}}
{{{(cross((x-1))(x+1))/cross((x-1)) - x = y}}}
{{{(x+1) - x = y}}}
{{{highlight(y=1)}}}