Complex Numbers Answers

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

If , what is the value of i 3?

–1

–i

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

2 + 15i

17 + i

20 – 3i

4 – i

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

–2 + i

–2 – i

2 + i

2 – i

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

StartRoot 5 EndRoot

StartRoot 13 EndRoot

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

III

Which expression is equivalent to ?

Negative 4 StartRoot 5 EndRoot

Negative 4 StartRoot 5 EndRoot i

4 StartRoot 5 EndRoot i

4 StartRoot 5 EndRoot

What is the square root of -1?

–i

–1

Which of the following is equivalent to ?

18 – 5i

18 + 5i

What is the sum of and ?

4 StartRoot 2 EndRoot

4 StartRoot 2 EndRoot i

5 StartRoot 2 EndRoot

5 StartRoot 2 EndRoot i

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