Question 983540
{{{2sqrt(x)=(x-8)}}}

square both sides

{{{4x=(x-8)^2}}}

{{{4x=x^2-16x+64}}}


{{{x^2-20x+64=0}}}


{{{x^2-16x-4x+64=0}}}


{{{x(x-16)-4(x-16)=0}}}

(x-16)(x-4)=0