Question

How do you simplify `(6 + i )(8 – 3i)`?

Answer 1

It is `51-10i`

Explanation:

If you add or multiply complex numbers in algebraic form you do it as if they were real numbers but you have to remember that the square of imaginary unit `i` equals to `-1`

`(6+i)(8-3i)=48-18i+8i-3i^2=48-18i+8i+3=51-10i`