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5-92.

For each of the following rational expressions, add or subtract, then simplify. Homework Help ✎

  1. The denominators are the same, so just add the numerators.

    Factor the numerator and look for a Giant One.

  2. See part (a).

  3. The product of the two denominators is the common denominator. Multiply each term by a Giant One to make the denominators the same.

    Distribute:

    Now, subtract. Notice you are subtracting a negative 2 in the second term.

  4. See part (c).