Complex Numbers

Question 1

What is the square root of –16?

Revolt · Accepted Answer

4i

Question 2

What is the square root of -1?

Revolt · Accepted Answer

i

Question 3

Which of the following is an example of a complex number that is not in the set of real numbers?

Revolt · Accepted Answer

4 + 9i

Question 4

Which expression is equivalent to i 233?

Revolt · Accepted Answer

i

Question 5

If f(x) = x3 – 2x2, which expression is equivalent to f(i)?

Revolt · Accepted Answer

2 – i

Question 6

Which complex number has a distance of from the origin on the complex plane?

Revolt · Accepted Answer

4 – i

Question 7

Which of the following is equivalent to ?

Revolt · Accepted Answer

18 – 5i

Question 8

Which complex number is represented by the point graphed on the complex plane below?

Revolt · Accepted Answer

3 – 4i

Question 9

What is the sum of and ?

Revolt · Accepted Answer

4 StartRoot 2 EndRoot i

Complex Numbers Answers