Question 150357
{{{3/(x^2-3x+2)}}} - {{{7/(x^2-x-2)}}} + {{{3/(x^2-1)}}}
Factor the denominators:
{{{3/((x-2)(x-1))}}} - {{{7/((x-2)(x+1))}}} + {{{3/((x-1)(x+1))}}}
:
The common denominator: (x-2)(x+1)(x-1)
{{{(3(x+1) - 7(x-1) + 3(x-2))/((x-2)(x+1)(x-1))}}}
:
{{{(3x + 3 - 7x + 7 + 3x - 6)/((x-2)(x+1)(x-1))}}} = {{{(-x + 4)/((x-2)(x+1)(x-1))}}}