Use the example below to demonstrate how to add or subtract two fractions by finding the least common denominator. Show why it is advantageous to use the least common denominator instead of another common denominator.
$\frac{1}{3 q^{2}-5 q-12}+\frac{-3}{-2 q^{2}+9 q-9}$

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The Answer of Use the example below to demonstrate how to add or subtract two fractions by finding the least common denominator. Show why it is advantageous to use the least common denominator instead of another common denominator.
$\frac{1}{3 q^{2}-5 q-12}+\frac{-3}{-2 q^{2}+9 q-9}$

Use the Example Below to Demonstrate How to Add or Subtract