Question

Complex numbers

simplify.

\left(\sqrt{-5}+2\sqrt{20}\right)\left(-\sqrt{-5}\right)

Answer 1

-5+ 20i

Explanation:

just distribute:
`(√(-5))(2√(20)+√(-5))`--->
`(2√(-100)) -5` and because 100 is the perfect square of 10 you get -5+20i