Lesson 7-‐2 HW Answers Pg. 379/ #1 – 8
Additional Practice 1. c(8c + 7)
2. 3n2(n + 4)
3. 3x(5x4 - 6)
4. 4(−2s4 + 5t3 - 7)
Name ——————————————————————— 5. 6n(n5 + 3n3 − 4) LESSON
9.4
Date ————————————
2 Practice 6. 5m2(−m - m + 1) For use with pages 5932598
Solve the equation. 7. 16t(-t
+ 2)
1. (x 1 14)(x 2 3) 5 0 214, 3 4. (n 2 8)(n 28. 9) 53x 0 and 8, 9
2. (m 2 12)(m 1 5) 5 025, 12 3. (p 1 15)(p 1 24) 5 0 224, 215
1 4x + 5. 1(d 1 8)1 d 2 } 2 5 0 2
1
28, }2
6.
1 c 1 }34 2(c 2 6) 5 0
3
2}4 , 6
2 8. (y 2 3)(5y 1 10) 5 0 22, 3 9. (6b 2 4)(b 2 8) 5 0 }, 8 3 5 5 1 1 1 10. (8x 1 4)(6x 2 3) 5 0 2}, } 11. (3x 1 9)(6x 2 3) 5 023, } 12. (4x 1 5)(4x 2 5) 5 0 2}, } 2 2 4 4 2 7. (2z 2 8)(z 1 5) 5 0 25, 4
Old workbook Pg. 95/ #13 – 21
Factor out the greatest common monomial factor. 13. 10x 2 10y 10(x 2 y)
14. 8x 2 1 20y 4(2x 2 1 5y)
15. 18a2 2 6b 6(3a2 2 b)
16. 4x 2 2 4x 4x(x 2 1)
17. r 2 1 2rs r(r 1 2s)
18. 2m2 1 6mn 2m(m 1 3n)
19. 5p2q 1 10q 5q( p2 1 2)
20. 9a5 1 a3 a3(9a2 1 1)
21. 6w 3 2 14w2 2w2(3w 2 7)
22. m2 2 10m 5 0 0, 10
23. b2 1 14b 5 0 214, 0
24. 5w 2 2 5w 5 0 0, 1
25. 24k 2 1 24k 5 0 21, 0
26. 8r 2 2 24r 5 0 0, 3
27. 9p2 1 18p 5 0 22, 0
5 28. 6n2 2 15n 5 0 0, } 2 1 2 31. 8c 5 4c 0, } 2
5 29. 28y 2 2 10y 5 0 2}, 0 4 1 2 32. 30r 5 215r 2}, 0 2
5 30. 210b 2 1 25b 5 0 0, } 2 3 2 33. 224y 5 9y 2}, 0 8
Solve the equation.
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34. Diving Board A diver jumps from a diving board that is 24 feet above the water.
The height of the diver is given by 1.5 sec; Yes. From the equation, you can see that the factor t 2 1.5 will be zero when t 5 1.5. h 5 216(t 2 1.5)(t 1 1) where the height h is measured in feet, and the time t is measured in seconds. When will the diver hit the water? Can you see a quick way to find the answer? Explain. 35. Dog To catch a frisbee, a dog leaps into the air with an initial velocity of 14 feet