Question

Evaluate the expression (3 - sqrt-16)(-3 +sqrt-9) and write the result in the form a+ b i.

Answer 1

\[(3-\sqrt{-16})(-3+\sqrt{-9})\\
(3-4i)(-3+3i)\\
-9 - 12i + 9i-12i^2\\
-9 - 3i-12(-1)\\
3 - 3i\]

Answer 2

thank you so much!

Answer 3

I got 3+21i for my answer though. thank you:)

Answer 4

Oh yes, I made a mistake with the sign. Good eye