1.Multiplying Binomials Using FOIL.notebook
September 29, 2014
Mon. Sept. 29/14
Current Unit: #2- Quadratic Algebra
Goal: To be able to multiply two binomials
1.
2.
3.
4.
How would you multiply these?
Lesson: Multiplying Binomials
Practice
Grade rep assembly
video
Oct 19­7:45 PM
1
1.Multiplying Binomials Using FOIL.notebook
September 29, 2014
How would you multiply these
a) (x+3)(x+7)
b) (x­2)(x+5)
Sep 29­8:11 AM
2
1.Multiplying Binomials Using FOIL.notebook
September 29, 2014
Multiplying Binomials Using FOIL
2x
3x 5
2x 33
( 2x + 3 ) ( 3x + 5 )
First
F
Outside
O
6x2 + 10x
Inside Last
I
L
+ 9x
+ 15
Mar 19­7:45 AM
3
1.Multiplying Binomials Using FOIL.notebook
September 29, 2014
Final Step: Combine like terms
6x2 + 10x + 9x + 15
6x2 + 19x + 15
Mar 19­7:45 AM
4
1.Multiplying Binomials Using FOIL.notebook
September 29, 2014
What is standard form of a
quadratic function?
f(x)= ax2 + bx + c
Move to reveal!
Standard form
5
1.Multiplying Binomials Using FOIL.notebook
September 29, 2014
Distribute!
(x + 3)(x ­ 8)
x(x ­8) + 3(x ­8)
x2 ­8x +3x ­24
x2 ­5x ­24
1. Everyone in first
parentheses
3. Combine
like terms
2. Multiply! (move
to reveal)
wants to meet everyone in second!
(move to reveal)
Distributing
6
1.Multiplying Binomials Using FOIL.notebook
September 29, 2014
Your Turn!
Distribute the following....
(x + 4)(x + 5)
Pull for answer
(2x ­1)(x ­ 3)
2x2 ­ Pull for answer
Distributing practice
7
1.Multiplying Binomials Using FOIL.notebook
September 29, 2014
What do you see in common?
Parabolas
Jan 31­6:00 PM
8