Question 1169379
Not sure what you have
{{{x-3sqrt(x)-54=0}}}
?
{{{x-3sqrt(x-54)=0}}}
?


"yes"----------------
No!  <b>WHICH ONE?</b>



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{{{x-3sqrt(x)-54=0}}}
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To begin, {{{x-54=3sqrt(x)}}}

{{{(x-54)^2=9x}}}

{{{x^2-108x+54^2-9x=0}}}

{{{x^2-117x+2916=0}}}


Using general solution for quadratic equation,
{{{x=(117+- 45)/2}}}


{{{highlight(x=36)}}}  or  {{{highlight(x=81)}}}