1 / 11

Do Now 5/29/09

Do Now 5/29/09. Copy HW in your planner. Text p. 797, #4-38 evens Take out HW from last night. Cumulative Test In your notebook, define and give two examples of rational numbers. Text p. 762, #1-16 all, not 2. 1) 40 3) 2 4) -1 5) (x – 5)(x + 3) 6) 2(x – 3)(x – 1) 7) (3x + 5)(3x – 5)

cyrah
Télécharger la présentation

Do Now 5/29/09

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Do Now 5/29/09 • Copy HW in your planner. • Text p. 797, #4-38 evens • Take out HW from last night. • Cumulative Test • In your notebook, define and give two examples of rational numbers. • Text p. 762, #1-16 all, not 2

  2. 1) 40 3) 2 4) -1 5) (x – 5)(x + 3) 6) 2(x – 3)(x – 1) 7) (3x + 5)(3x – 5) 8) 3x(x + 4)(x – 4) 9) 1 1/12 10) 19/40 11) 1/3 12) 1 1/4 13) 9/4 14) 6 15) -3, 2 16) 13 HomeworkText p. 762, #1-16 all; not 2

  3. Objective • SWBAT simplify rational expressions.

  4. Section 12.4 “Simplify Rational Expressions” • A RATIONAL EXPRESSION is an expression that can be written as a ratio (fraction) of two polynomials where the denominator is not 0. • A rational expression is UNDEFINEDwhen the denominator is equal to 0. • A number that makes a rational expression undefined is called an EXCLUDED VALUE.

  5. EXAMPLE 1 Find the excluded values, if any, of the expression. Use quadratic formula to find when w = 0. Factor There are no excluded values

  6. Simplify Rational Expressions • To simplify a rational expression, you can factor the numerator and denominator and then divide out any common factors. • A rational expression is in SIMPLEST FORMif the numerator and denominator have no factors in common other than 1.

  7. EXAMPLE 2 Simplify the rational expression, if possible. State the excluded values. Factor

  8. EXAMPLE 3 Simplify the rational expression, if possible. State the excluded values. Factor Factor

  9. EXAMPLE 4 Recognize opposites Simplify the rational expression, if possible. State the excluded values. Factor Recognize opposites Multiply by -1 Rewrite (4-x) as -(x-4) Factor Recognize opposites Multiply by -1 Rewrite (z-5) as -(z+5)

  10. Classwork/Homework • Text p. 797, #4-36 multiples of 4

  11. HomeworkPractice worksheet 12.4 evens 14) 2) 4) 16) 6) 18) 8) 10) 12)

More Related