Week 4 Assignment

Week 4 Assignment - Week 4 Assignment

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Week 4 Assignment 1, 4, 9, 11, 15, 17, 21, 25, 30, 35, 37, 41, 45, 47, 53, 56, 57, 60,  Section 3.2 5, 10, 15, 20, 25, 28, 35, 37, 43, 48, 51, 59, 62, 66, 67, 72,  Section 3.3 1, 3, 5, 7, 9, 13, 15, 21, 25, 33, 35, 41, 45, 53, 57, 61, 65, 71,  Section 3.4 1, 10, 14, 23, 27, 31, 37, 42, 47, 51, 59, 61, 64, 68, 69, 72, 73,  Section 3.1 1. 7xy + 6y The degree is the sum of the exponents of the term 7x 1 y 1 . The degree is 2. 4. 5x 3 y 2 - 6x 3 y 3 The degree is the highest sum of exponents; the term 6x 3 y 3 . The de- gree is 6. 9. -12 -12 = 12x 0 The degree is the exponent; the degree is 0. 11. 3x - 7 and 7x + 4 (3x - 7) + (7x + 4) 3x - 7 + 7x + 4 3x + 7x - 7 + 4 10x - 3
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15. 3x 2 - 5x - 1 and 4x 2 + 7x - 1 (3x 2 - 5x - 1) + (4x 2 + 7x - 1) 3x 2 - 5x - 1 - 4x 2 + 7x - 1 3x 2 - 4x 2 - 5x + 7x - 1 - 1 x 2 - 2x - 2 17. (12a 2 b 2 - 9ab) + 5a 2 b 2 + 4ab) 12a 2 b 2 - 9ab + 5a 2 b 2 + 4ab 12a 2 b 2 + 5a 2 b 2 - 9ab + 4ab 17a 2 b 2 - 5ab 21. (3x + 4) - (5x - 2) 3x + 4 - 5x + 2 3x - 5x + 4 + 2 -2x + 6 25. (7x 2 + 9x + 8) from (3x 2 - x + 2) (7x 2 + 9x + 8) - (3x 2 - x + 2) 7x 2 + 9x + 8 - 3x 2 + x - 2 7x 2 - 3x 2 + 9x + x + 8 - 2 4x 2 + 10x + 6 30. 6x 3 + x 2 + 4 from 9x 3 - x - 2 (6x 3 + x 2 + 4) - (9x 3 - x - 2) 6x 3 + x 2 + 4 - 9x 3 - x - 2 6x 3 - 9x 3 + x 2 - x + 4 - 2 3x 3 - x 2 - x - 6 35. 2x 2 + x + 6 from 4x 2 - x - 2
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4x 2 - x - 2 - 2x 2 + x + 6 2x 2 - 2x - 8 37. -2x 3 + 6x 2 - 3x + 8 - (x 3 + x 2 - x - 1 -3x 3 + 5x 2 - 2x + 9 41. (x 2 + 9x - 4) + (-5x 2 - 7x + 10) -(2x 2 - 7x - 1) x 2 + 9x - 4 - 5x 2 - 7x + 10 - 2x 2 + 7x + 1 x 2 - 5x 2 - 2x 2 + 9x - 7x + 7x - 4 + 10 + 1 -6x 2 + 9x + 7 45. (-12n 2 - n + 9) - [(5n 2 - 3n - 2) + (-7n 2 + n + 2)] -12n 2 - n + 9 - [5n 2 - 3n - 2 - 7n 2 + n + 2] -12n 2 - n + 9 - ( -2n 2 - 2n) -12n 2 - n + 9 + 2n 2 + 2n -12n 2 + 2n 2 - n + 2n + 9 -10n 2 + n + 9 47. (5x + 2) + (7x - 1) + (-4x - 3) 5x + 2 + 7x - 1 - 4x - 3 5x + 7x - 4x + 2 - 1 - 3 8x - 2 53. (7x 2 - x - 4) - (9x 2 - 10x + 8) + (12x 2 - 4x - 6) 7x 2 - x - 4 - 9x 2 + 10x - 8 + 12x 2 + 4x - 6 7x 2 - 9x 2 + 12x 2 - x + 10x + 4x - 4 - 8 - 6 10x 2 - 13x - 18
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56. (6n 2 - 4) - (5n 2 + 9) - (6n + 4) 6n 2 - 4 - 5n 2 + 9 - 6n + 4 n 2 - 6n - 17 57. 3x - [5x - (x + 6)] 3x - [5x - x - 6] 3x - [4x -6] 3x - 4x + 6 -x + 6 60. 4x 2 - [-x 2 - (5x 2 - 6)] 4x 2 - [-x 2 - 5x 2 + 6] 4x 2 - [-6x 2 + 6] 4x 2 + 6x 2 - 6 10x 2 - 6 66. 3x 2 - [4x 2 - 2x - (x 2 - 2x + 6)] 3x 2 - [4x 2 - 2x - x 2 + 2x - 6] {2x and 2x cancel out} 3x 2
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This note was uploaded on 04/19/2011 for the course MATH 112 taught by Professor . during the Fall '10 term at Mountain State.

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Week 4 Assignment - Week 4 Assignment

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