Question

The product (5+i) (5-i) is a real number, 26. What are two factors (5+i) and (5-i) called?

Answer 1

Complex numbers

Explanation:

Given

5 + i and 5 - i

Required

What are they called?

In numbering system,

Complex numbers are of the form:

`a + bi`

Comparing the given numbers to the form of complex number, we'll see that there's a perfect match between the two

i.e.

`a + bi = 5 + i`

`a + bi = 5 - i`

Hence, they are referred to as complex numbers