Question 76836
Factor and cancel any factors that match top to bottom.

3s^2-9st-54t^2/3s^2-6st-72t^2
{{{3(s^2-3st-18t^2)/(3(s^2-2st-24t^2))}}}
{{{(3(s-6t)(s+3t))/(3(s-6t)(s+4t))}}}
{{{cross(3)*cross((s-6t))*(s+3t)/(cross(3)*cross((s-6t))*(s+4t))}}}
{{{highlight((s+3t)/(s+4t))}}}
Happy Calculating!!!