Question

What is the value of (–3 3i) (–2 3i)?

Answer 1

`-3-15i`

Explanation:

`(-3+3i)(-2+3i)`

Multiply the parenthesis. multiply each term in first parenthesis with each term in second parenthesis.

`(-3+3i)(-2+3i)`

`-3(-2+3i)+3i(-2+3i)`

`6-9i-6i+9i^2`

The value of i^2 is -1

`6-9i-6i+9(-1)`

`6-15i-9`

`-3-15i`