Algebra › Section G · Rational expressions and functions › Topic G.1
Multiplying and dividing rational expressions
A rational expression is a fraction whose top and bottom are polynomials - and fractions of polynomials obey the exact same arithmetic as numerical fractions, with factoring doing the heavy lifting.
In this topic
- Fractions, upgraded
- Excluded values come first
- Simplifying: factor, then cancel factors
- Restrictions survive cancellation
- Opposite factors
- Multiplying rational expressions
- Worked example: everything cancels
- Worked example: dividing by flipping
- Common mistakes to avoid
- Key takeaways
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