Question

How do you simplify `( 3 + i ) ( 3 + i )`?

Answer 1

`8+6i`

Explanation:

It is the known square `(a+b)^2`. So you apply its formula to this complex number.

`(3+i)(3+i) = (3+i)^2 = 3^2 + 2*3i+i^2 = 9 + 6i - 1 = 8+6i`