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11-20.
  1. For each rational expression below, state any values of the variables that must be excluded (because they will make the denominator zero). Then complete each part. Homework Help ✎

    1. Use the fact that (x + 4)2 = (x + 4)(x + 4) to rewrite . Then look for 1s and simplify.

    2. Use the strategy in part (a) to simplify the expression .

Does anything factor out?

x ≠ −4 or 2

Does anything factor out?