Operations with Complex Numbers

Question 1

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

Revolt · Accepted Answer

4 – i

Question 2

If the complex number x = 3 + bi and |x|2 = 13, which is a possible value of b?

Revolt · Accepted Answer

2

Question 3

What is the square root of –16?

Revolt · Accepted Answer

4i

Question 4

What is the distance from the origin to point A graphed on the complex plane below?

Revolt · Accepted Answer

StartRoot 13 EndRoot

Question 5

What is the sum of and ?

Revolt · Accepted Answer

4 StartRoot 2 EndRoot i

Question 6

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

Revolt · Accepted Answer

2 – i

Question 7

In which quadrant is the number –14 – 5i located on the complex plane?

Revolt · Accepted Answer

III

Operations with Complex Numbers Answers