Question

What is the name of a number that can be written in the form a + bi where a and b are nonzero real

numbers? (1 point)
a pure imaginary number
an imaginary unit
a real number
a complex number

Answer 1

Complex numbers

Explanation:

Given

`a + bi`

Required

Determine the type of number in that form

Numbers written in
`a + bi` are referred to as complex numbers

Where
`a \\eq 0`;
`b\\eq 0` and
`i = √(-1)`

Note that a and b can either integers or non integers and a and be can also be positive or negative

The following are valid examples of complex numbers

`2 + 3i`

`2.4 - 5i`

`-3 - i`

and lots more..