# Sums and Differences of Rational Expressions Putting factoring skills to use again (7.8)

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Sums and Differences of Rational Expressions Putting factoring skills to use again (7.8)

POD #2 Multiply and simplify. Then try this one.

Adding and subtracting fractions How would you add these fractions? What is the difference between them? What is the most important thing to consider when adding and subtracting fractions?

With this in mind Add these rational expressions. Simplify the final result.

Careful about those common denominators! Try this.

Yesterday’s trick Can you remember how we approached this last time? Once we do that, let’s mix it up.

Sometimes it’s easier to… … simplify before adding. Change it up.

Sometimes we need to… …combine terms then cancel. We do that in the numerator here.

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