Question 152382
Presumably you would like to simplify this fraction:
{{{(10x^2-30x+20)/(x^2-1)}}} Factor the numerator and the denominator.
{{{10(x^2-3x+2)/(x^2-1)}}}
{{{(10*cross((x-1))(x-2))/((x+1)cross((x-1)))}}} Cancel the indicated factors.
{{{10(x-2)/(x+1)}}}