Question

If b = 0, then the complex number a + bi is a ___ number.

Answer 1

a + bi --> a + (0)i --> a + 0 --> a

A would be a real number. I could be underthinking this but, because anything multiplied by 0 is zero (including complex numbers), then i would just cancel out. i is what makes the number complex....

Answer 2

a + bi is a real number.

What is a complex number?

A complex number is a number that has two parts. One is real part and the other one is imaginary part.

Here, b = 0. Therefore, the imaginary part is zero.

Hence, a + bi is a real number.

Learn more about complex number: https://brainly.com/question/20566728

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