WorksheetsComplex Number Practice
Total questions: 10
Worksheet time: 26mins
Name
Class
Date
1.
What is i?
a)
1
b)
-1
c)
√-1
d)
√1
2.
Which of the is a complex number?
a)
2
b)
4i
c)
3 + 5i
d)
All of them
e)
none of them
3.
Simplify: (8 + 2i) + ( -2 - 3i)
a)
10 - i
b)
10 + 5i
c)
6 + 5i
d)
6 - i
4.
Write in standard form: (5 + 3i)(5 - 3i)
a)
34
b)
16
c)
25 - 30i + i2
d)
24 - 30i
5.
√-36
a)
6
b)
-6
c)
-6i
d)
6i
6.
What is the conjugate of 5 - 2i?
a)
5 + 2i
b)
-5 - 2i
c)
5 - 2i
d)
-5 + 2i
7.
What does i2 = ?
a)
-1
b)
√-1
c)
1
d)
-√1
8.
How do you write a complex number?
a)
a-bi
b)
a+bi
c)
ai+b
d)
ai-b
9.
Find the sum.
(5 - 2i) + (-7 + 8i)
a)
-2 + 6i
b)
12 + 6i
c)
-35 - 16i2
d)
-35 - 16i
10.
Multiply:
(2 - 5i)(2 + 5i)
a)
29
b)
4 - 25i
c)
25 - 10i
d)
-21
100 %
