01:57duration 1 minute 57 seconds

Rationalizing a denominator: Quotient involving a…

Rationalizing a denominator: Quotient involving a monomial

Two quick demonstratoins of a rational expression containing radicals being ratioinalized by multiplication of a form of one to transform a radical in the denominantor to a whole number.

04:04duration 4 minutes 4 seconds

Rationalizing a denominator: Square root of a…

Rationalizing a denominator: Square root of a fraction

This discusses what rationals and irratioinals are, then goes on to demonstrate how to eliminate any radical number in the denominator.