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Use the Example Below to Demonstrate How to Add or Subtract

Question 167

Essay

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.
13q2−5q−12+−3−2q2+9q−9\frac{1}{3 q^{2}-5 q-12}+\frac{-3}{-2 q^{2}+9 q-9}

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