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11-70.
  1. Simplify each expression. Homework Help ✎

Begin by factoring x2 − 4.

Multiply the first term by a Giant One that will make the two denominators the same.

Factor both denominators.

Refer to part (a).

Factor all parts of the problem that can be factored. Remove Giant Ones.

Remove Giant Ones.

If you aren't sure, substitute different numbers for x.