Question 55243
Simplify and reduce 
{{{(3x^2-12)/(9x+18)}}} First factor completely.
{{{3(x^2-4)/(9(x+2))}}}
{{{3(x+2)(x-2)/(3*3(x+2))}}}  Now cancel the things that match between the numerator and denominator.
{{{cross(3)*cross((x+2))*(x-2)/(cross(3)*3*cross((x+2)))}}}
{{{highlight((x-2)/3)}}}
Happy Calculating!!!