Multiplying a Dividing Rational Expressions Lesson 8.4 Algebra II.

Multiplying a Dividing Rational Expressions

Lesson 8.4Algebra II

Agenda

Test results… MUCH BETTER!Lesson 8.4 Multiply and Divide Rational ExpressionsHomework: Read Lesson 8.4, (on pages 577-580) do exercises 1, 3 – 5, 6, 8, 12, 17, 18, 24, 29, 31, 34, 39, 43, 51 and 58.


Definition of a rational function:A rational function is when you have one polynomial divided by another polynomial.Example:


Definition of a rational expression:One expression divided by another:Example:


Sometimes we can simplify a rational expression. If both the numerators and denominators have common factors the expression can be simplified:Some Examples:


We can also multiply one rational expression by another. Like any fraction, you would multiply the numerator times the numerator and the denominator times the denominator.Example:


Dividing Rational Expression:

What is the definition of division?



What is the definition of division?

That’s right, multiplication of the reciprocal.So when dividing rational expressions… take the reciprocal of the second expression and multiply it by the first.



Example:

Multiplying a Dividing Rational Expressions Lesson 8.4 Algebra II.

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