These rational expressions all have the same denominator. Write the sum of their numerators over the common denominator:

Study the example shown below.Which expression should replace the word “numerator” in the work shown?

Complete the following steps to find the LCD and write the sum of the numerators for the given problem:Factor each denominator:x2 – 3x – 4 =

x2 – 6x + 8 =
What is the numerator in the sum?
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