


Rational FunctionsEquivalent Rational FunctionsWe assume that you are familiar with the arithmetic operations of fractions of numbers. A rational function is the ratio of two polynomials. Examples, , , The top part of a rational function is called the numerator
and the bottom part the denominator. ReductionAs with fractional numbers, we can simplify (reduce) a rational function by cancelling common factors found in both the numerator and denominator of the function (dividing by a common factor): ExampleMore Examples (this opens in another window) ExerciseThe technique of factorization of a polynomial is often needed. ExamplesExerciseA common mistake: Cancelling part of a sum or difference. ONLY common factors can be cancelled.
Rational Functions Index  Addition and Subtraction of Rational Fractions >>
