Question 986091
{{{ 5sqrt(x) - x = 6 }}}
{{{ 5sqrt(x) = x + 6 }}}
Square both sided
{{{25x = x^2 + 12x + 36}}}
{{{x^2 -13x + 36 = 0}}}
*[invoke quadratic "x",1,-13,36]
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x = 4
x = 9