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# Chapter 4 Answers and Grade MAT 117 - 2z(2z 1(z 5 0.6...

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NAME YOUR ANSWERS IN THIS COLUMN ANSWER POINTS Section 4.1 pp. 353-355 14, 42, 60, 62 14 GCF =6a^2b^2 6 a^2 b^2 1.2 good 42 2st(2+3-7t) 2s ( 2 + 3t - 7t^2) 1.0 You're missing a t here. 60 zy 3y 1.0 62 x(3x+5);3x+5 3x + 5 1.2 good Section 4.2 pp. 363-365 28, 56, 66 28 (x+4)(x-15) (x + 4) (x - 15) 1.2 good 56 2a(a-2)(a-24b) 2a (a - 2b) (a - 24b) 1.2 66 1,2,3,4………. Not sure on this one? 2, 6, 12, 20, … 0.6 almost Section 4.3 pp. 373-374 52, 70 52 2(7x-3)(x-1) 2 (7x - 3) (x- 1) 1.2 good 70 -1(35-2)(5+4) (-3s + 2) (s + 4) 1.2 typos Section 4.4 pp. 379-381 24, 48, 54, 60, 64 24 (5x-9y)(5x+9y) (5x + 9y)(5x - 9y) 1.2 good 48 Not a perfect square no 1.2 good 54 (4x+5y)^2 (4x + 5y)^2 1.2 good 60 could not figure out tried and tried and gave up. (b-c)(a+4b)(a-4b) 0.5 64 K=49 49 1.2 good Section 4.5 p. 384 8, 16 8 (x-4)(x^2+2 (x-4)(x^2 + 2) 1.2 good 16 (a^2+b^2)(3a+2b) (a^2 + b^2)(3a + 2b) 1.2 good Section 4.6 pp. 394-397 22, 24, 68, 100 22 m=5 n=-3 Factorable; 5,-3 1.2 good 24 Not Factorable Not factorable 1.2 good 68 (4w)(3w+4) (4w + 1)(3w _x0001_+4) 1.2 good 100 (2z)(2z^2-10z) 2z(2z +1)(z- 5)
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Unformatted text preview: 2z(2z +1)(z- 5) 0.6 Section 4.7 pp. 402-403 8, 28, 32 8 Grouping (p-3q)(z+q) Grouping, (p-3q)(2+q) 1.2 good 28 Factoring Difference of squares (m^2-3n^2)(m^2+3n^2) Difference of squares, (m^2+ 3n^2)(m^2 - 3n^2) 1.2 good 32 (3x+3y-5)(3x+4y+5) (3x + 2y+ 5)(3x+ 2y- 5) 0.9 Section 4.8 pp. 408-409 24, 48 24 x=6 or x-1/2 3/4, 4 0.6 48 could not figure out tried and tried and gave up. 10 cm by 10 cm 0.6 1.2 1.2 27.7 Select one challenge, writing, or group exercise from any of the end-of-section exercises in Ch. 4. If you choose a group exercise, find a partner and work on the problem together in the Chat Room forum. Compose a note explaining how you arrived at the solution. What difficulties (if any) did you encounter? Submit your answer(s) to your Individual forum Post your response to this question to your Individual forum: Which of the Ch. 4 text exercises (or practice exercises on MathZone) did you find the most challenging and why?...
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