1 / 8

Warm Up Multiply.

Warm Up Multiply. 1. x ( x 3 ). x 4. 2. 3 x 2 ( x 5 ). 3 x 7. 3. 2(5 x 3 ). 10 x 3. 4. x (6 x 2 ). 6 x 3. 5. xy (7 x 2 ). 7 x 3 y. 6. 3 y 2 (–3 y ). –9 y 3. Objectives. Use binomial expansion to expand binomial expressions that are raised to positive integer powers.

flynn-mclaughlin
Download Presentation

Warm Up Multiply.

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. Warm Up Multiply. 1. x(x3) x4 2. 3x2(x5) 3x7 3. 2(5x3) 10x3 4. x(6x2) 6x3 5. xy(7x2) 7x3y 6. 3y2(–3y) –9y3

  2. Objectives Use binomial expansion to expand binomial expressions that are raised to positive integer powers.

  3. Notice the coefficients of the variables in the final product of (a+ b)3. these coefficients are the numbers from the third row of Pascal's triangle. Each row of Pascal’s triangle gives the coefficients of the corresponding binomial expansion. The pattern in the table can be extended to apply to the expansion of any binomial of the form (a + b)n, where n is a whole number.

  4. This information is formalized by the Binomial Theorem, which you will study further in Chapter 11.

  5. Example 5: Using Pascal’s Triangle to Expand Binomial Expressions Expand each expression. A. (k –5)3 1 3 3 1 Identify the coefficients for n = 3, or row 3. [1(k)3(–5)0] + [3(k)2(–5)1] + [3(k)1(–5)2] + [1(k)0(–5)3] k3 – 15k2 + 75k – 125 B. (6m – 8)3 1 3 3 1 Identify the coefficients for n = 3, or row 3. [1(6m)3(–8)0] + [3(6m)2(–8)1] + [3(6m)1(–8)2] + [1(6m)0(–8)3] 216m3 – 864m2 + 1152m – 512

  6. Check It Out! Example 5 Expand each expression. a. (x +2)3 1 3 3 1 Identify the coefficients for n = 3, or row 3. [1(x)3(2)0] + [3(x)2(2)1] + [3(x)1(2)2] + [1(x)0(2)3] x3 + 6x2 + 12x + 8 b. (x –4)5 1 5 10 10 5 1 Identify the coefficients for n = 5, or row 5. [1(x)5(–4)0] + [5(x)4(–4)1] + [10(x)3(–4)2] + [10(x)2(–4)3] + [5(x)1(–4)4] + [1(x)0(–4)5] x5 – 20x4 + 160x3 – 640x2 + 1280x – 1024

  7. Check It Out! Example 5 Expand the expression. c. (3x +1)4 1 4 6 4 1 Identify the coefficients for n = 4, or row 4. [1(3x)4(1)0] + [4(3x)3(1)1] + [6(3x)2(1)2] + [4(3x)1(1)3] + [1(3x)0(1)4] 81x4 + 108x3 + 54x2 + 12x + 1

  8. Lesson Quiz Find each product. 1. 5jk(k – 2j) 5jk2– 10j2k 2. (2a3– a + 3)(a2+ 3a – 5) 2a5 + 6a4 – 11a3+ 14a – 15 3. Find the product. (y – 5)4 y4 – 20y3 + 150y2 – 500y + 625 4. Expand the expression. (3a – b)3 27a3 – 27a2b + 9ab2 – b3

More Related