Complex Numbers Answers
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1
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Which expression is equivalent to ?
A
Negative 4 StartRoot 5 EndRoot
B
Negative 4 StartRoot 5 EndRoot i
C
4 StartRoot 5 EndRoot i
D
4 StartRoot 5 EndRoot
2
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Which of the following is equivalent to ?
A
5iB
18 – 5iC
18 + 5iD
233
Which complex number has a distance of from the origin on the complex plane?
A
2 + 15iB
17 + iC
20 – 3iD
4 – i4
What is the distance from the origin to point A graphed on the complex plane below?
A
StartRoot 5 EndRoot
B
StartRoot 13 EndRoot
C
9D
135
What is the square root of –16?
A
–8iB
–4iC
4iD
8i6
If f(x) = x3 – 2x2, which expression is equivalent to f(i)?
A
–2 + iB
–2 – iC
2 + iD
2 – i7
If the complex number x = 3 + bi and |x|2 = 13, which is a possible value of b?
A
2B
4C
9D
108
Which complex number has an absolute value of 5?
A
–3 + 4iB
2 + 3iC
7 – 2iD
9 + 4i9
What is the sum of and ?
A
4 StartRoot 2 EndRoot
B
4 StartRoot 2 EndRoot i
C
5 StartRoot 2 EndRoot
D
5 StartRoot 2 EndRoot i
10
Which complex number is represented by the point graphed on the complex plane below?
A
–4 + 3iB
3 + 4iC
3 – 4iD
4 + 3iDid you find these answers helpful?
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