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Rational Expressions

An intro to simplifying
by

Dawn Klein

on 10 November 2012

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Transcript of Rational Expressions

Definition Simplest Form Divide out common factors in the
numerator and denominator: A rational expression is the
quotient of two polynomials.

Rational expressions can be
thought of as ratios or
fractions. A rational expression is in simplest form when its numerator and denominator are polynomials that have no common divisors.

Think: How do you put a fraction
in simplest form? Use the same approach for polynomials in a rational expression.

Divide out (cancel) common factors in the numerator and denominator: Rational
Expressions Why can we do this?
*Multiplicative Identity Property* Recall...Can fractions have zero in the denominator? http://www.educreations.com/lesson/view/12-4-ex-3/693979/?ref=appemail Example: Write your answer in simplified form and state the excluded values.
Power Writing You have 1 Minute!

Write or type everything you can remember about simplifying fractions.

1. "On the topic of simplifying rational expressions, one thing I am still confused about is..."

2. "The best thing I learned about simplifying rational expressions was..." Exit Ticket Choose one of the following writing prompts.
Write or type and hand in at the end of class. Rule: You can only cancel out FACTORS, not terms within the parentheses. We can't do this: And we can't do this:
Full transcript