1 / 6

Using the AC method to factor

Using the AC method to factor. When factoring x^2+bx+c, sometimes there can be many factors of c. Example: Factor. If you recall, if a =1 then we factor c and we look for the pairs of factors that sum to the middle term, b.

haviva-stokes
Download Presentation

Using the AC method to factor

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. Using the AC method to factor

  2. When factoring x^2+bx+c, sometimes there can be many factors of c Example: Factor If you recall, if a =1 then we factor c and we look for the pairs of factors that sum to the middle term, b So we want to find the factors of 442 that add up to -9. There are many factors of 442 so let’s use our calculator to help us.

  3. In this case, we want to find the factors of 442 Press the following sequence of buttons on your calculators Y=, 442, /, x, 2nd, GRAPH

  4. You should see the following on your screen (before pressing 2nd GRAPH) After pressing 2nd GRAPH you should see something like this: If you don’t see this, then go to the next slide for trouble shooting. If you do see this, then skip the next slide.

  5. Press 2nd, then WINDOW You should see the following Set your independent to Auto, your table start at 0, and your triangle table = to 1v Now press 2nd and then GRAPH Then you should see what we got before

  6. Scroll down to look through the factors. We are looking for the pair that add OR subtracts to -9 The only pair that this can happen with is 17 and 26. Since we want it to add to -8, the factors should be -26 and +17 So therefore, our factors are: Multiply it out to make sure that it checks!

More Related