Question

What is the sum of -9 and -18?

Answer 1

-9+-18=-27 You simply add the two negative answers to find your final answer. -27

Answer 2

Answer: The answer to the question you asked up top would be -27, however the question in the picture doesn't match. As for the question in the picture, the answer is should be choice B or  4 square root 2i

Step-by-step explanation:

The first one: add the number together since they are both negative and just place a negative sign in front.

The second one: break down the square root of -18 into 9*-2. Then add   $\sqrt{-2} + 3 \sqrt{-2}$  which equals $4\sqrt{2}i$