Solve: 2x2 - 15x 18 = 0
Practice solving a quadratic equation: 2x2 - 15x 18 = 0
NOTE TITLE CHANGE: Multiplying Three Rational Expressions
A multiplication problem involving three rational expressions is demonstrated.
Square Roots: Summary: Square Roots
This clip summarizes square roots. It revisits the meaning of square roots and squares, then reminds us of the usefulness of square root tables. The clip also mentions that decimal square roots are neither terminating nor repeating decimals, and tha...
Denominator of a Simplified Expression Never Has Radicals, The
A guideline is presented: a simplified radical expression never has radicals in the denominator. An expression with a radical in the denominator, but not in the numerator, is simplified using the identity property of multiplication and the process o...
Dividing Rational Expressions: Two Practice Problems
Practice problems for dividing rational expressions.
Division with a Binomial in the Numerator
Examples of simplifying radical expressions with division when numerators contains a binomial.
Prime Numbers: Another Method of Finding Prime Factors
This clip explains that with larger numbers, it's more difficult to "Â…just examine the number, see some factors, examine those and so on until you're done." In such cases, the clip explains, there's another method of finding prime factors, which co...
Prime Numbers: Factors of Thirteen
This clip contrasts the number twelve, which can be factored in several ways, with the number thirteen, which can only be factored as thirteen times one. The clip states that the question of whether or not a whole number has smaller factors becomes ...
Prime Numbers: Introducing Factoring
This clip introduces factoring, explaining in the process that every number equals itself times one, and that the order of the numbers doesn't matter in factoring.
Prime Numbers: Method of Finding Prime Factors, A
This clip states one of the most basic laws of arithmetic: every number has one and only one prime factorization. The clip also explains how to determine that factorization, using a process known as branching. The clip also states that prime factori...