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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,  66, 69, 72 & 73 Section 3.2 5, 10, 15, 20, 25, 28, 35, 37, 43, 48, 51, 59, 62, 66, 67, 72,  75, 79, 82, 85, 88 & 91 Section 3.3 1, 3, 5, 7, 9, 13, 15, 21, 25, 33, 35, 41, 45, 53, 57, 61, 65, 71,  76, 77, 86 & 89 Section 3.4 1, 10, 14, 23, 27, 31, 37, 42, 47, 51, 59, 61, 64, 68, 69, 72, 73,  81, 83, 85, 89 92 & 95 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
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 - [4x 2 - x 2 - 6] 3x 2 - [3x 2 - 6] {3x 2 and 3x 2 cancel out, leaving 6} 6 69. [4x 3 - (2x 2 - x - 1)] = [5x 3 - (x 2 + 2x - 1)] [4x 3 - 2x 2 + x + 1] - [5x 3 - x 2 - 2x + 1] 4x 3 - 2x 2 + x + 1 - 5x 3 + x 2 + 2x - 1 4x 3 - 5x 3 - 2x 2 + x 2 + x + 2x + 1 - 1 -x 3 - x 2 + 3x
72.

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Week 4 Assignment - Week 4 Assignment...

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