Question

what is the square root of -9?

Answer 1

please explain

Answer 2

Try taking the square root of 9

Answer 3

Imaginary numbers

Answer 4

3

Answer 5

then once you do that you can multiply the square root of 9 by sqrt(-1) which is equal to i

Answer 6

3i

Answer 7

i is the letter used to represent complex numbers which is equivalent to 'the square root' of -1

Answer 8

correct

Answer 9

sqrt(-9)

Pull all perfect square roots out from under the radical. In this case, remove the 3i because it is a perfect square.
3i

Answer 10

so the answer is 3 right?

Answer 11

Answer is 3i

Answer 12

not quite dany. you have to multiply the 3 by i so see @Blank 

Answer 13

@Blank  has posted the correct answer

Answer 14

what about -16 square root is that 4i?

Answer 15

@dannyrod2000 exactly. Well done

Answer 16

and -4 square root is 2i?

Answer 17

yes, correct

Answer 18

ok thanks @VeritasVosLiberabit and @Blank