Question 1077513
{{{ 2x^2 - 36 = 0 }}}
{{{  x^2 - 18 = 0 }}}
{{{  (x-sqrt(18))*(x+sqrt(18)) = 0 }}}

Noting that {{{sqrt(18) = 3sqrt(2) }}}, the solutions are:

{{{ highlight( x= 3*sqrt(2)) }}}
and
{{{highlight( x=-3*sqrt(2) ) }}}