Simplify -√-9??

2 Answers
Apr 18, 2018

-3i

Explanation:

-sqrt(-9) = - i sqrt9
- i sqrt9 =-3i

Apr 18, 2018

-3i

Explanation:

Everytime you have a negative sign in the root, that means the solution is imaginary.

As you can see, the number inside the square root is -9, so the solution is imaginary.

i, or imaginary, equals to sqrt(-1), so we can take that out of the root:
-sqrt(9)*sqrt(-1)

-3*i

So the simplification of -sqrt(-9) is:
-3i

Hope this helps!