Question 6433
{{{64k^2 - 81 = 0}}}
{{{64k^2 = 81}}}
{{{k^2 = 81/64}}}
{{{k = + sqrt(81/64)}}} or {{{k = - sqrt(81/64)}}}
{{{k = (sqrt(81)/sqrt(64))}}} or {{{k = - (sqrt(81)/sqrt(64))}}}
{{{k = 9/8}}} or {{{k = -9/8}}}


jon.