Download presentation

Presentation is loading. Please wait.

Published byTracy Howard Modified over 4 years ago

1
M ULTIPLYING P OLYNOMIALS : FOIL Lesson 10-3

2
M ULTIPLYING P OLYNOMIALS When multiplying two BINOMIALS… …we multiply by “FOIL” First terms Outer terms Inner terms Last terms

3
M ULTIPLYING P OLYNOMIALS (2 x + 1) ( x – 5) FOIL = distribution, combine like terms 2 x – 10 x + 1 x -5 2 x – 9 x -5

4
M ULTIPLYING P OLYNOMIALS (3 x – 5) (2 x + 7) 6 x ² + 21 x – 10 x – 35 6 x ² + 11 x – 35 ( x – 7) (3 x + 1) 3 x ² + x – 21 x – 7 3 x ² – 20 x - 7

5
M ULTIPLYING P OLYNOMIALS Special products: ( x – 5) ( x + 5) x ² + 5 x – 5 x – 25 x ² – 25 Special products: (2 x – 8) (2 x + 8) 4 x ² + 16 x – 16 x – 64 4 x ² – 64

6
M ULTIPLYING P OLYNOMIALS When multiplying a trinomial & binomial… … distribution and combine like terms (3 x ² + x – 6) (2 x – 3) (2 x – 3) (3 x ² + x – 6) 6 x ³ + 2 x ² – 12 x - 9 x ² - 3 x + 18 6 x ³ - 7 x ² – 15 x + 18

7
M ULTIPLYING P OLYNOMIALS Find the product: (3 a + 4) (5 a ² + 2 a – 3) 15 a ³ + 6 a ² - 9 a + 20 a ² + 8 a – 12 15 a ³ + 26 a ² - a - 12

8
P RACTICE a) ( x + 2) ( x + 5) b) (2 x – 1) ( x + 2) c) ( a – 6) ( a + 6) d) ( f ² - 3 f ) ( f ² + 6 f – 4)

9
H OMEWORK p. 478-479 #14-19, 23-29, 41-43

Similar presentations

© 2020 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google