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# 7.1 Multiplying and Dividing Monomials

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### Transcript

• 1. 7.1 Multiplying and Dividing Monomials February 26, 2013 The Return of Polynomials Label the parts of the polynomial 2x2 ­ 3 Group the like terms 2x2 ­ 3x + 7 ­ 4x + 10x2 + 12 The Return of Polynomials We have previously learned how to add and subtract  polynomials, but what should we do in this situation? 2(2x)
• 2. 7.1 Multiplying and Dividing Monomials February 26, 2013 The Return of Polynomials Youve seen this before... 2(3) 7.1 Multiplying & Dividing  Polynomials
• 3. 7.1 Multiplying and Dividing Monomials February 26, 2013 Multiplying Expand: 5(2x) Multiplying Expand: ­3x(3x)
• 4. 7.1 Multiplying and Dividing Monomials February 26, 2013 Multiplying Expand: 3x(2y) Multiplying Expand 5(2x)
• 5. 7.1 Multiplying and Dividing Monomials February 26, 2013 Multiplying Expand 3x(3y) Multiplying Expand 10x(5x)
• 6. 7.1 Multiplying and Dividing Monomials February 26, 2013
• 7. 7.1 Multiplying and Dividing Monomials February 26, 2013 Mental Math Add the following: 2x + 3y ­ 5x + 4y Multiply the following: 3x(4x) 2x(10y) Question Why do we use a grid to show multiplication?
• 8. 7.1 Multiplying and Dividing Monomials February 26, 2013 Dividing What do we do in this situation? 10 5 Dividing Divide:  10x 5
• 9. 7.1 Multiplying and Dividing Monomials February 26, 2013 Dividing Divide:  ­8x2 2x Dividing Divide:  12xy 4x
• 10. 7.1 Multiplying and Dividing Monomials February 26, 2013 Dividing Divide: 10x 5 Dividing Divide: ­12xy 4x
• 11. 7.1 Multiplying and Dividing Monomials February 26, 2013 Dividing Divide: ­14x2 ­2x Word Problems What is an expression for the area of the rectangle? 4.3x 2x
• 12. 7.1 Multiplying and Dividing Monomials February 26, 2013 Word Problems The area of a triangle is given by the expression  18x2. The base of the triangle is represented by 4x.  What is the height of the triangle in terms of x? BTW ­ the height of a triangle can be found: Height = 2 x area/base
• 13. 7.1 Multiplying and Dividing Monomials February 26, 2013