Question 177013
{{{(x^2+8x+12) /( x^2+13x+42) }}}


The first step is to factor the numerator and denominator.  If you don't know how to factor, then you should see lesson plans or my website about factoring trinomials.

{{{((x+6)(x+2))/((x+6)(x+7))}}}


The factors of (x+6) divide out!

{{{(x+2)/(x+7) }}}


R^2