In this lesson on rational expressions, the focus is on adding expressions that already have a common denominator. The process involves adding the numerators and keeping the denominator intact, then simplifying if possible. Examples are given with both numeric and algebraic denominators, with the latter requiring factoring to see if there are any common factors that can be cancelled out. The lesson stresses the importance of not cancelling unless there are factors present and provides tips for factoring to determine if cancelling is possible.
How to add rational expressions that already have a common denominator, and how to simplify if it is possible to cancel.
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