Answer:
2i, if you don't understand any of the steps let me know, I'd be happy to explain.
Step-by-step explanation:
[tex]\sqrt{-x} =\sqrt{-1*x} ,\sqrt{xy}=\sqrt{x} \sqrt{y}, \sqrt{-1}=i[/tex]
so in order -4 = -1 * 4 so then [tex]\sqrt{-1*4}=\sqrt{-1} \sqrt{4}[/tex] then just solve each
