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Multiplying a Binomial by a Binomial

Multiplying a Binomial by a Binomial. The FOIL Method. Today’s Objective:. Review homework answers Multiply a binomial by a binomial using the FOIL method. Homework # 104 odds Answers. 4a 2 + 3z 3. 2x 2 – 5x 5. -3n 3 – 6n 2

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Multiplying a Binomial by a Binomial

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  1. Multiplying a Binomial by a Binomial The FOIL Method

  2. Today’s Objective: • Review homework answers • Multiply a binomial by a binomial using the FOIL method

  3. Homework # 104 odds Answers • 4a2 + 3z 3. 2x2 – 5x 5. -3n3 – 6n2 • 15x3 – 3x2 + 12x 9. 8b3 + 36b2 – 4b • 4m4 + 6m3 – 10m2 13. 3w2 + 7w 15. -2p2 + 3p • 3x3 + 8x 19. -22b2 + 2b + 8 21. a = -7 25. m = -2

  4. What does FOIL stand for? FOIL is an acronym that stands for F – first O- outer I – inner L – last So what does that help me do?

  5. FIRST (x + 3)(x – 4) The terms in red are first terms. Multiply them. (x)(x) x2

  6. OUTER (x + 3)(x–4) The terms in red are the outer terms. Multiply them. (x)(-4) -4x

  7. INNER (x + 3)(x– 4) The terms in red are the inner terms. Multiply them. (3)(x) 3x

  8. LAST (x + 3)(x– 4) The terms in red are the last terms. Multiply them. (3)(-4) -12

  9. Now combine like terms. First = x2 Outer = -4x Inner = 3x Last = -12 x2 – x – 12

  10. (x + 3)(x– 4) F L I O

  11. Classwork • Complete p. 19 as classwork, check answers with Ms. Cruz • Log in to Carnegie • Homework #105 p. 20 odds

  12. Remember, all these power points are posted on my website for you to refer back to when your at home and have questions. Miss you guys!

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