- Video 4 -Rational Expressions, Ratio and Proportions.
- Rational Expressions - I.
This segment covers multiplication and division of rational expressions as well as reducing to lowest terms by factoring both numerator and denominator. In case of multiplication the use of dividing out common factors before multiplication to simplify work is covered.
- Rational Expressions - II.
This segment covers addition and subtraction of rational expressions by finding the least common denominator after factoring all denominators. This segment also covers simplifying complex fractions.
- Equations with Rational Expressions.
This segment covers methods for solving equations involving rational expressions which can be reduced to either linear or quadratic equations on multiplication of both sides of the equation by the least common denominator of all denominators in the equation. The notion of elimination of extraneous roots or solutions by checking all solutions in the original equation is also covered.
- Ratio and Proportion.
This segment covers a definition of ratio as well as three ways of writing ratios. Proportions are solved by setting cross products equal, and applications are solved by setting up and solving proportions.
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