Math CentralQuandaries & Queries


Question from pamela, a parent:


Hi Pamela.

The important thing is that when you are adding or subtracting rational expressions, you must make sure you first have a common denominator. In the question you sent us, there already is a common denominator of w - 4, so you can simply add the numerators and simplify.

The numerator in the final expression doesn't factor, so this is in simplest form now.

Stephen La Rocque.


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