Test-bank-thinking-mathematically-5th-edition-blitzer.pdf
Copyright © 2018 Pearson Education, Inc. 259 259
Copyright © 2018 Pearson Education, Inc.
x
-axis at 0.
Precalculus 6th Edition Blitzer TEST BANK
Precalculus 6th Edition Blitzer SOLUTIONS MANUAL
\ Chapter 2
Polynomial and Rational Functions
Section 2.1
Check Point Exercises
1. a.
(5
−
2
i
)
+
(3
+
3
i
)
=
5
−
2
i
+
3
+
3
i
c.
−
14
+
−
12
=
−
14
+
i
12 2 2
=
−
14
+
2
i
3 2
=
−
14
+
2
i
3 2 2
=
(5
+
3)
+
(
−
2
+
3)
i
=
8
+
i
b.
(2
+
6
i
)
−
(12
−
i
)
=
2
+
6
i
−
12
+
i
5.
x
2
−
2
x
+
2
=
0
a
=
1,
b
=
−
2,
c
=
2
2
=
−
7
+
i
3
=
(2
−
12)
+
(6
+
1)
i
=
−
10
+
7
i
x
=
−
b
±
b
−
4
ac
2
a
2. a.
7
i
(2
−
9
i
)
=
7
i
(2)
−
7
i
(9
i
)
−
(
−
2)
±
x
=
(
−
2)
2
−
4(1)(2) 2(1)
=
14
i
−
63
i
2
=
14
i
−
63(
−
1)
=
63
+
14
i
x
=
2
±
4
−
8 2
b.
(5
+
4
i
)(6
−
7
i
)
=
30
−
35
i
+
24
i
−
28
i
2
=
30
−
35
i
+
24
i
−
28(
−
1)
=
30
+
28
−
35
i
+
24
i
=
58
−
11
i
x
=
2
± −
4 2
x
=
2
±
2
i
2
x
=
1
±
i
The solution set is {1
+
i
, 1
−
i
}.
3.
5
+
4
i
=
5
+
4
i
⋅
4
+
i
4
−
i
4
−
i
4
+
i
20
+
5
i
+
16
i
+
4
i
2
=
Concept and Vocabulary Check 2.1
16
+
4
i
−
4
i
−
i
2
=
20
+
21
i
−
4
1.
1 ;
1 16
+
1
=
16
+
21
i
2.
complex; imaginary; real 17
=
16
+
21
i
3.
6
i
Copyright © 2018 Pearson Education, Inc. 260 260
Copyright © 2018 Pearson Education, Inc.
4. a.
17 17
−
27
+
−
48
=
i
=
i
27
+
i
9
⋅
3
+
i
48 16
⋅
3
4.
14
i
5.
18 ;
15
i
; 12
i
;
10
i
2
; 10
=
3
i
=
7
i
3
+
4
i
3 3
6.
2
9
i
7.
2
5
i
b.
(
−
2
+
−
3)
2
=
(
−
2
+
i
3)
2
=
(
−
2)
2
+
2(
−
2)(
i
3)
+
(
i
3)
2
8.
i
;
i
; 2
i
5
=
4
−
4
i
=
4
−
4
i
=
1
−
4
i
3
+
3
i
2
3
+
3(
−
1) 3
9.
1
i
6 2
Copyright © 2018 Pearson Education, Inc. 261 261
Copyright © 2018 Pearson Education, Inc.
Chapter 2
Polynomial and Rational Functions
Section 2.1
Complex Numbers
Exercise Set 2.1
1.
(7 + 2
i
) + (1
–
4
i
) = 7 + 2
i
+ 1
–
4
i
= 7 + 1 + 2
i
–
4
i
14.
(8
–
4
i
)(
–
3 + 9
i
)
24
72
i
12
i
36
i
2
=
–
24 + 36 + 84
i
= 12 + 84
i
2.
(
–
2 + 6
i
) + (4
–
i
) =
–
2 + 6
i
+ 4
–
i
=
–
2 + 4 + 6
i
–
i
= 8
–
2
i
15.
(3
5
i
)(3
5
i
)
9
15
i
15
i
25
i
2
9
25
34 = 2 + 5
i
3.
(3 + 2
i
)
–
(5
–
7
i
) = 3
–
5 + 2
i
+ 7
i
16.
2
7
i
2
7
i
4
49
i
2
4
49
53 = 3 + 2
i
–
5 + 7
i
=
–
2 + 9
i
4.
(
–
7 + 5
i
)
–
(
–
9
–
11
i
) =
–
7 + 5
i
+ 9 + 11
i
=
–
7 + 9 + 5
i
+ 11
i
= 2 + 16
i
5.
6
(
5
4
i
)
(
13
i
)
6
5
4
i
13
i
24
3
i
17.
18.
(
5
i
)(
5
i
)
25
5
i
5
i
i
2
25
1
26 (
7
i
)(
7
i
)
49
7
i
7
i
i
2
49
1
50
2
2
6.
7
(
9
2
i
)
(
17
i
)
7
9
2
i
17
i
33
i
7.
8
i
–
(14
–
9
i
) = 8
i
–
14 + 9
i
19.
2
3
i
4
12
i
9
i
4
12
i
9
5
12
i
=
–
14 + 8
i
+ 9
i
=
–
14 + 17
i
8.
15
i
–
(12
–
11
i
) = 15
i
–
12 + 11
i
=
–
12 + 15
i
+ 11
i
=
–
12 + 26
i
20.
5
2
i
2
25
20
i
4
i
2
25
20
i
4
21
20
i
2 2 3
i
9.
–
3
i
(7
i
–
5)
21
i
2
15
i
21.
3
i
3
i
3
i
=
–
21(
–
1) + 15
i
= 21 + 15
i
2(3
i
)
9
1 2
3
i
10.
–
8
i
(2
i
–
7)
16
i
2
56
i
=
–
16(
–
1) + 56
i
10
11.
9
25
i
2
9
25
34 = 16 + 56
i
(
5
4
i
)(3
i
)
15
5
i
12
i
4
i
2
3
i
5 3 1
15
7
i
4
19
7
i
i
5 5
22.
3 3 4
i
12.
(
4
8
i
)(3
i
)
12
4
i
24
i
8
i
2
4
i
4
i
4
i
12
28
i
8
4
28
i
3
4
i
16
i
2
3
4
i
13.
(7
–
5
i
)(
–
2
–
3
i
)
14
21
i
10
i
15
i
2
=
–
14
–
15
–
11
i
=
–
29
–
11
i
17 12 3
i
17 17
Test-bank-thinking-mathematically-5th-edition-blitzer.pdf
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