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# Foil2

## on Jan 19, 2011

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## Foil2Presentation Transcript

• FOIL
Front---Outer---Inner---Last
• (2x + 5)(3x + 5)
F + O + I + L
(2x*3x) + (2x*5) + (5*3x) + (5*5)
6x² + 10x + 15x + 25
6x² + 25x +25
1.
• F + O + I + L
(3x*4x) + (3x*9) + (9*4x) + (9*9)
12x² + 27x + 36x +81
12x² +63x + 81
2. (3x + 9 )(4x +9)
• (-2x + 7)(3x + 8)
F + O + I + L
(-2x*3x) + (-2x*8) + (7*3x) + (7*8)
-6x² - 16x + 21x + 56
-6x² + 5x +56
• (2x – 5)(3x + 8)
F + O + I + L
(2x*3x) + (2x*8) + (-5*3x) + (-5*8)
6x² + 16x -15x -40
6x² + x - 40
• (4X -2)(X-5)
F + O + I+ L
(4x*x) + (4x*-5) + (-2*x) + (-2*-5)
4x² + -20x – 2x + 10
4x² -22x + 10
• (3x + 7)(4x-2)
F + O + I+ L
(3x*4x) + (3x*-2) + (7*4x) + (7*-2)
12x² + -6x +28x - 14
12x²+22x - 14
• 7. (-2X +4)(4X-3)
F + O + I+ L
(-2x*4x) + (-2x*-3) + (4*4x) + (4*-3)
-8x² + 6x +16x - 12
-8x² +22x - 12
• 8. (X -3)(X+3)
F + O + I+ L
(x*x) + (x*3) + (-3*x) + (-3*3)
x² + 3x -3x - 9
x² - 9
• 9. (2X +5)(3X+7)
F + O + I+ L
(2x*3x) + (2x*7) + (5*3x) + (5*7)
6x² + 14x + 15x + 35
6x² + 29x + 35
• 10. (6X -3)(2X+5)
F + O + I+ L
(6x*2x) + (6x*5) + (-3*2x) + (-3*5)
12x² + 30x - 6x - 15
12x² + 24x - 15