Factoring Rational Functions

Since fractions of polynomials form a field, every element (other than zero) divides any other, so there is no useful notion of irreducible factors. Thus the factor operation is not very useful for fractions of polynomials. Instead, there is a specific operation factorFraction that separately factors the numerator and denominator and returns a fraction of the factored results.

You can also use map. This expression applies the factor operation to the numerator and denominator.