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# Algebra 6 Point 9

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FOIL

FOIL

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### Transcript

• 1. 6.9 Multiplying Binomials
Objective:
• To multiply 2 binomials
• 2. To multiply a binomial by a trinomial
• 3. To learn about FOIL
Frameworks: 10.P.3
• 4. How would you multiply . . .
(x + 3)(x + 5)
1. Distribute the first x to the x and the 5
2. Distribute the 3 to the x and the 5
FOIL
http://www.freemathhelp.com/using-foil.html
• 5. FOIL
(x + 3)(x + 5)
First terms: x and x x2
Outside terms: x and 5 5x
Inside terms: 3 and x 3x
Last terms: 3 and 5 15
Answer: x2 + 8x + 15
• 6. Try some:
(2x + 1)(7x – 4)
(a – 3)(a + 4)
(5y – 2)(27 + 4)
• 7. Try some:
(5a –b)(-2a + b)
(6x – y)(-x – y)
• 8. Turn to page 230
Do 1-4