Question 1039140
Perform the indicated operations and simplify:

 4x/x^2-16 - 3/x-4
= {{{4x/((x-4)*(x+4)) - 3/(x-4)}}}
Find a common denominator.  (x-4)*(x+4) works.
= {{{4x/((x-4)*(x+4)) - 3(x+4)/((x-4)*(x+4))}}}
= {{{4x/(x^2-16) - (3x+12)/(x^2-16)}}}
= {{{(x-12)/(x^2-16)}}}
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