Question 897724
You most likely mean, (3x^2+3x-6)/(x^2-4) which renders as {{{(3x^2+3x-6)/(x^2-4)}}}.


FACTORIZE the numerator and the denominator.  Do then what you normally do when reducing or simplifying fractions.


{{{(3(x^2+x-2))/((x+2)(x-2))}}}


{{{(3(x-1)(x+2))/((x+2)(x-2))}}}


{{{(3(x-1)cross((x+2)))/(cross((x+2))(x-2))}}}