Question

Which of the following is used to represent complex numbers?

A.
x2 + y
B
C.
bi + 2
D.
a + bi

Answer 1

Answer: D) a+bi

Where both a and b are real numbers.

In your textbook, you might see
`a,b \in \mathbb{R}` to indicate that they are real numbers.

An example would be 7+13i, where a = 7 and b = 13.