Question

Simplify the expression.

Answer 1

The answer is -21-33i

Answer 2

For this case we have the following expression:

$(-3 + 6i) (- 3 + 5i)$

To solve the problem, we apply the distributive property.

We have then:

$(9 - 15i) + (-18i + 30i ^ 2)$

Rewriting we have:

$30i ^ 2 -33i + 9\\30 (-1) -33i + 9\\-30 -33i + 9\\-33i - 21$

Therefore, the answer for this case is:

$-21-33i$

Answer:

-21-33i

Note: review the options again. The answer does not seem to be among the options.