# Multiplying Polynomials.  1. Use FOIL method if you have 2 Binomials. ◦ F (first) O (outer) I (inner) L (last)  2. Use Distribution otherwise.  Remember.

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Multiplying Polynomials

 1. Use FOIL method if you have 2 Binomials. ◦ F (first) O (outer) I (inner) L (last)  2. Use Distribution otherwise.  Remember to combine any like terms and write answer in descending order.

 1. 2x 3 (4x 2 – 3x + 2)  2. (6x + 1)(4x+ 7)  3. (x – 9)(4x + 9)  4. (2x + 6) 2  5. (2x – 1)(x 3 – 3x 2 + 4x – 2)

 Two binomials are conjugates if they are the sum and difference of the same two terms.  Find the conjugate of each:  1. -x + 5  2. 3x – 9  3. 2x 2 + 10y

 (a + b)(a – b) =  (a + b)(a – b) = a 2 - b 2  1) (2x + 4)(2x – 4) =  2) [(y + 3) + z][(y + 3) – z] =

 1. Find (f·g)(x)  2. Find (f·g)(3)  3. Find (f·g)(-1)

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