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6-2. Multiplying Polynomials. Lesson Quiz. Lesson Presentation. Holt Algebra 2. 2. (2 a – 3)( a + 5). Lesson Quiz. Find each product. 1. 5 jk ( k – 2 j ). 5 jk 2 – 10 j 2 k. 2 a 2 + 7 a –15. Objectives. Multiply polynomials.

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6-2

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  1. 6-2 Multiplying Polynomials Lesson Quiz Lesson Presentation Holt Algebra 2

  2. 2. (2a– 3)(a+ 5) Lesson Quiz Find each product. 1. 5jk(k – 2j) 5jk2– 10j2k 2a2 + 7a –15

  3. Objectives Multiply polynomials.

  4. To multiply a polynomial by a monomial, use the Distributive Property and the Properties of Exponents.

  5. Exponent Rules When you multiply like bases, you add the exponents and the base stays the same. When you divide like bases, you subtract the exponents and the base stays the same. Power raised to a power, you multiply the powers and the base stays the same. Zero exponent, the answer is one and the base goes away. Negative exponent, send the base to the other side, and the exponent becomes positive.

  6. x2 –4x1 x2 5x Check It Out! Example 2b Find the product. (x2 +5x)(x2 - 4x+1) Multiply each term of one polynomial by each term of the other. Use a table to organize the products. The top left corner is the first term in the product. Combine terms along diagonals to get the middle terms. The bottom right corner is the last term in the product. x4+ (–4x3 + 5x3) + (– 20x2 + x2) + (5x) x4 + x3 – 19x2 + 5x

  7. x2 +4x -1 2x2 -5x 3 Check It Out! Example 2b Find the product. (2x2 – 5x + 3)(x2 + 4x – 1) Multiply each term of one polynomial by each term of the other. Use a table to organize the products. The top left corner is the first term in the product. Combine terms along diagonals to get the middle terms. The bottom right corner is the last term in the product. 2x4+ (- 5x3 + 8x3) + (3x2 -20x2 - 2x2) + (+12x +5x) -3 2x4 + 3x3 -19x2 +17x -3

  8. Assignment ALL Odd numbers Starting with 1. (6n+2)(-5n2 + 8n + 5) Need to see 1,3, 5 before you leave class today. Due Wed/Thurs(whichever day I have you) Quiz Tomorrow

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