Question

Find all the real square roots of -1/-121
a) -1/11
b) 1/11, -1/11
c) 11, -11
d) none

Answer 1

square roots produce positive answers, by definition. So a, b, and c are wrong, but d is also wrong, because (-1)/(-121) has a square root of 1/11.

A different question of solve x^2 = (-1)/(-121) has the answer of b.

Answer 2

Why not write (-1)/(-121) as 1/121?

Answer 3

@Parth - I only did it that way to preserve her original question

Answer 4

\[\large \rm \sqrt{1 \over 121} = {\sqrt{1} \over \sqrt{121}}\]

Answer 5

Thanks everyone i think explaining how to get the answer helps me to better understand :) Thanks!