02:06
Multiplying Rational Expressions
Demonstration of the procedure for multiplying rational expressions.
01:24
Associative Law for Addition
The associative law for addition: (a b) c = a (b c).
03:01
Estimating Radicals to Set a Safe Speed Limit
A practical problem involving setting a speed limit is solved that involves estimating radicals to find the value of an irrational solution.
02:26
Working With the Discriminant First
Work with the discriminant first because it determines whether or not the equation has a solution. If the discriminant is positive, the equation has two solutions. If the discriminant is negative, the equation has not solution. Examples of both are ...