Question

Evaluate the sqaure root of -25.

Answer 1

@agent0smith

Answer 2

\[\large \sqrt{-25} = \sqrt{-1*25} =\sqrt{-1 }\sqrt{25} \]

Answer 3

why so ? everybody know that sqrt(-1) = i so than will be isqrt25 = +/- 5i

Answer 4

@jhonyy9 It would be \(5i\) right?

Answer 5

+/- 5i because (+5i)^2 = -25 and (-5i)^2 = -25

Answer 6

It is 5i and only 5i.

Answer 7

Why can it be -5?

Answer 8

Oh okay. So it's only 5i

Answer 9

\[\large x^2 = -25\]is not the same thing as \[\large x = \sqrt{-25}\]

Answer 10

Thanks all for your help. I have a couple more that I need help with

Answer 11

Actually i have only one.

\(-|-8|\) would equal to \(-8\) right?

Answer 12

yup :)

Answer 13

oops, I forgot I was viewing closed questions. >.<