Lesson 8-‐7 HW Answers Pg. 456/ #11 – 13, Pg. 457/ #6 – 20 (18 ques7ons) 11. 2(x - 7)2 = 98
12. -5(x + 3)2 = -80
x = -7 or x = 1
x = 0 or x = 14 13. 0.5(x + 2)2 - 4 = 14
14. 3(x - 1)2 + 1 = 19
x = -8 or x = 4
6 x = 1 ± √"
5. no real solutions
6. ±6
7. ±5
8. ±8
8 9. ±_ 7
10. ±9
1 13. ±_ 2
11 12. ±_ 9 11 14. ±_ 10
15. ±2.65
16. no real solutions
17. ±8.37
18. 14.1 seconds
11. no real solutions
19. height: 14.2 m, base: 7.1 m 20. b = 16