Question

What is the square root of -72?

Answer 1

You can't take the square root of a negative number.

Answer 2

Unless you are dealing with imaginary number

Answer 3

If your asking for the solutions to $$x^2=-72$$ They are $$-i\sqrt{72},i\sqrt{72}$$

Answer 4

Assuming you need imaginary solutions then yes, the square root of -72 would just be:
\[i \sqrt{72}\]. But of course that can be simplified further ifyou know how to :3

Answer 5

well, some of my answer choices are imaginary.
-6 sqrt2
6sqrt-2
6sqrt2i
6isqrt2

Answer 6

\[\sqrt{-72}=i \sqrt{72}= i \sqrt{9*8}= i \sqrt{9}\sqrt{8}=3i \sqrt{8}=3i \sqrt{2*4}=6i \sqrt{2}\] Do you understand the process of doing that?