College Algebra 9th txtbk

SA-2
Student Answer Appendix
Exercises 1-4
9. (A) 3 5
(B) (C) 3 11. (A) 6.5 (B) 2.1i (C) 6.5 2.1i 13. (A) 0 (B) i (C) i
2 5 2 6 i
6 i
15. (A) 4 (B) 0 (C) 4
Exercises 1-5
19. z 4125 25. Two real roots: x 1 12 27. No real roots: x 1 i12 29. No real roots: t (3 i17)2
31. Two real roots: t (3 17)2 33. x 2 15 35. r (5 13)2 37. u (2 i111)2 43. y (3 15)2
45. x (3 113)2
Exercises 1-6
10
27. 2u 2 4u 0, u x 3 29. Not of quadratic type 31. 35. m 13, i15 39.
9 4u 7u2 0, u 1 x 2
5 113
51. y 1 53. t 12 63. x (four roots)
3 i12
3
2 , 12
B 6
y 64, 27 8
Chapter 1 Review Exercises
5. 14 y 4; (14, 4) (1-3) ( y
9. x 2 7 or 1 (1-5) 13. m 1 2 2 114
2 (132)i (1-5)
14 4
(
]
19. x 19; [19, ) (1-2) x 27. x (1 143)3 (1-5) 37. I (E 2E 2 4PR)(2R) (1-5)
19
CHAPTER 2 Exercises 2-1
15. y
17.
5
(4, 2) (4, 4)
(5, 0)
5 5
x
(3, 2)
5
y
5
(2, 1)
5 5
(0, 2)
(1, 3)
(4, 5)
5
x
19. Points: A (2, 4), B (3, 1), C (4, 0), D (5, 2)
Reflections: A(2, 4), B(3, 1), C(4, 0), D(5, 2)
21. Points: A (3, 3), B (0, 4), C (3, 2), D (5, 1)
Reflections: A(3, 3), B(0, 4), C(3, 2), D(5, 1)
23. No symmetry with respect 25. Symmetric with respect 27. Symmetric with respect 29. Symmetric with respect
to x axis, y axis, or origin to the origin to the x axis to the x axis, y axis, and origin
y
y
y
y
5
5
5
5
5
5
x
5 5
x
5 5
x
5 5
x
5
5
5
5
35. (A) y
(B) y
(C) y
(D)
y
5
5
5
5
5
x
5 5
x
5
5
x
5
5
x
5
5
5
5