Question

hi guys, quick q, wood love a hand please?
if sqrt x = -1

...does x = 1 fit?
or is there no solution to this?

Answer 1

impossible!!! sqrt(n) cannot be negative

Answer 2

...hmm but 4 can be (-2)^2 or (+2)^2 ...

Answer 3

yup sqare root of 1 can be 1 or -1 as

Answer 4

but square of real number can not be negative

Answer 5

ahh
\[x^{2} = 4 \rightarrow x = \pm \sqrt{4}\]
BUT
\[\sqrt{4} = 2 and \sqrt{-4} = impossible\]

Answer 6

gotcha, cheers guys, treat it like a one way street then.
Thanks again

Answer 7

:)