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Worksheets

Complex Numbers

Total questions: 15

Worksheet time: 51mins

Name
Class
Date
1.
a)
10
b)
-10
c)
10i
d)
-10i
2.

(3 + 2i) + (4 - 5i)

a)

7 + 7i

b)

1 - 3i

c)

1 - 7i

d)

7 - 3i

3.

(4 - 2i) - (3 + 6i)

a)

7 - 4i

b)

1 + 4i

c)

1 - 8i

d)

7 - 8i

4.

What does i2 equal?

a)

-1

b)

√-1

c)

1

d)

-√1

5.

What letter represents an imaginary number?

a)

a

b)

i

c)

j

d)

x

6.
√-36
a)
6
b)
-6
c)
-6i
d)
6i
7.

4i(28i)4i\left(-2-8i\right)  

(a)  

8.

3+3i+82i73+3i+8-2i-7  

(a)  

9.

(24i)(6+4i)\left(2-4i\right)\left(-6+4i\right)  

(a)  

10.

Which is the conjugate of (34i)\left(3-4i\right)  ?

a)

(34i)\left(3-4i\right)  

b)

(3+4i)\left(3+4i\right)  

c)

(34i)\left(-3-4i\right)  

d)

i-i  

11.

Simplify

a)

(-10+6i)/17

b)

(1+50i)/61

c)

(-23+36i)/25

d)

(-21+33i)/34

12.
a)
A
b)
B
c)
C
d)
D
13.
Simplify:
-3i(4 + 2i)
a)
6 - 12i
b)
6 + 12i
c)
-12i - 6i2
d)
-12i + 6i2
14.
Multiply
(3i)(-2+4i)
a)
-6+12i
b)
-12-6i
c)
-2+7i
d)
12+6i
15.
What is the conjugate of -2+5i?
a)
-5+2i
b)
-2-5i
c)
2+5i
d)
5-2i