WorksheetsImaginary Numbers
Total questions: 10
Worksheet time: 1hrs 4mins
Name
Class
Date
1.
Simplify √-4
a)
2i
b)
-2i
c)
2
d)
4i
2.
Simplify √-28
a)
-√28
b)
-2i√7
c)
2i√7
d)
28i
3.
Simplify 2√-40
a)
2i√40
b)
-4i√10
c)
4i√10
d)
-16i√2
4.
a)
10
b)
-10
c)
10i
d)
-10i
5.
1.
a)
A
b)
B
c)
C
d)
D
6.
Why did mathematicians create the concept of i?
a)
It was their favorite letter.
b)
They were frustrated with equations that were said to be "impossible" due to a negative number under a square root.
c)
They like to make things more complicated.
7.
Why does a negative under a square root turn into what we now know is called an imaginary number?
a)
You can not have a number multiplied by itself and receive a negative number as an answer.
b)
There are no factors of negative numbers.
c)
A negative number can not be multiplied by a positive.
8.
Which of the following is equivalent to
(5-3i)+(-6+2i)?
(5-3i)+(-6+2i)?
a)
-1-5i
b)
-1-i
c)
11-i
d)
-30-6i
9.
Which of the following is equivalent to (3-5i)-(6+2i)
a)
-3-7i
b)
-3-3i
c)
3-3i
d)
9-7i
10.
√-36
a)
6
b)
-6
c)
-6i
d)
6i
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