Lesson 6

Lesson 6 - Lesson 6 Rational expression a fraction with...

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Unformatted text preview: Lesson 6 Rational expression: - a fraction with polynomials in the numerator and denominator (a quotient or ratio of polynomials) ¡¢£¤¡¥¦§¢ ¡¢£¤¡¥¦§¢ Domain: - set of numbers for which an expression is defined - because rational expressions are fractions, we must exclude numbers from a rational expression’s domain that make the polynomial in the denominator equal to zero Simplifying rational expressions: 1. factor all the polynomials (if possible) 2. cancel common factors (if possible) A rational expression is simplified if its numerator and denominator have no common factors other ¨ or ©¨ Be sure to keep in mind that only common factors are cancelled ( NOT TERMS) . Multiplying rational expressions: 1. simplify, if possible 2. multiply numerator times numerator and denominator times denominator 3. again, simplify if possible Dividing rational expressions: 1. simplify, if possible 2. take the reciprocal of the divisor and change division to multiplication 3. multiply numerator times numerator and denominator times...
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This document was uploaded on 01/23/2012.

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Lesson 6 - Lesson 6 Rational expression a fraction with...

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