Download
3 5 adding and subtracting rational expressions n.
Skip this Video
Loading SlideShow in 5 Seconds..
3.5 Adding and Subtracting Rational Expressions PowerPoint Presentation
Download Presentation
3.5 Adding and Subtracting Rational Expressions

3.5 Adding and Subtracting Rational Expressions

92 Vues Download Presentation
Télécharger la présentation

3.5 Adding and Subtracting Rational Expressions

- - - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript

  1. 3.5 Adding and Subtracting Rational Expressions 12/12/12

  2. 3 5 x • • Divide out the common factor 5 and simplify. 3x = = 5 x 5 + b. x 6x 2 3 x 3 • • c. Divide out the common factors 2 and x. = = 14x2 2 7 x x 7x • • • Example 1 Simplify a Rational Expression Simplify the rational expression, if possible. 15x a. 5 This expression is already in simplest form.

  3. Ex 1: Simplify = Factor out 3xy

  4. Ex 2: Simplify = Factor out (x+5) = Combine Like Terms

  5. Ex 3: Simplify Big X = Factor out () Simplify brackets = a2 – b2

  6. Different Denominators: When adding/subtracting fractions and the denominators are different, find the least common denominator (LCD).

  7. Ex 4: Simplify LCD:

  8. Ex 5: Simplify Big X LCD: ( Simplify numerator

  9. Ex 6: Simplify Big X LCD: ( Switch the signs of the second numerator Combine Like terms

  10. Homework: WS 3.5 odd only