1 / 10

Do Now:

Do Now:. What’s the formula for area, again?. x - 5. What is the area of the shaded region?. 2x - 9. The 2nd method is the Box Method . This method works for every problem!. Here’s how you do it: (3x – 5)(5x + 2) Draw a box. Write a polynomial on the top & side of a box.

bryanz
Télécharger la présentation

Do Now:

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: What’s the formula for area, again? x - 5 What is the area of the shaded region? 2x - 9

  2. The 2nd method is the Box Method. This method works for every problem! Here’s how you do it: (3x – 5)(5x + 2) Draw a box. Write a polynomial on the top & side of a box. It does not matter where. This will be modeled in the next problem along with FOIL.

  3. 3) Multiply (3x - 5)(5x + 2) 15x2 First terms: Outer terms: Inner terms: Last terms: Combine like terms. 15x2 - 19x – 10 +6x -25x 15x2 -25x -10 +6x -10 You have 2 techniques. Pick the one you like the best!

  4. First terms: Outer terms: Inner terms: Last terms: Combine like terms. 21p2 – 34p + 8 4) Multiply (7p - 2)(3p - 4) 21p2 -28p -6p 21p2 -6p +8 -28p +8

  5. Multiply (y + 4)(y – 3) • y2 + y – 12 • y2 – y – 12 • y2 + 7y – 12 • y2 – 7y – 12 • y2 + y + 12 • y2 – y + 12 • y2 + 7y + 12 • y2 – 7y + 12

  6. Multiply (2a – 3b)(2a + 4b) • 4a2 + 14ab – 12b2 • 4a2 – 14ab – 12b2 • 4a2 + 8ab – 6ba – 12b2 • 4a2 + 2ab – 12b2 • 4a2 – 2ab – 12b2

  7. So, what if you have a binomial x trinomial? Please copy: (x + 3)(x² + 2x + 4)

  8. Horizontal Method: (x + 3)(x² + 2x + 4)  = x³ + 2x² + 4x + 3x² + 6x + 12Write terms in descending order…  = x³ + 2x² + 3x² + 4x + 6x + 12 Combine like terms = x³ + 5x² + 10x + 12

  9. Vertical Method: x² + 2x + 4 x + 3 x³ + 2x² + 4x 3x² + 6x + 12 x³ + 5x² + 10x + 12

  10. OK, your turn… Please use whiteboard or your notebook: (x+1)(x²+2x+1) (b2 + 6b –7)(3b – 4) (2x2 + 5x –1)(4x – 3) (2y – 3)(3y2 – y + 5) (x2 + 2x + 1)(x + 2)

More Related