Question

If √x = 8 , then x =?? show work

Answer 1

\[x = 64\]

Answer 2

square both sides :O

Answer 3

Or, try a slightly cooler approach using logarithms:
\[x^{1/2} = 8\]\[x^{1/2} = 2^{3}\]\[\log_{2}(x^{1/2}) = 3\]\[(1/2)\log_{2}x = 3\]\[\log_{2}x = 6\]\[x = 2^{6}\]\[x = 6\]

Answer 4

*Last line should read "x = 64"