Question 28283
1) Solve:
{{{x-2sqrt(x) = 0}}} Subtract {{{2sqrt(x)}}}from both sides of the equation.
{{{x = 2sqrt(x)}}} Now square both sides.
{{{x^2 = 4x}}} Divide both sides by x
{{{x = 4}}}

2) Here's the graph: The red line is y=x. The green line is {{{y=2sqrt(x)}}}
The points of intersection are: (0,0) and (4, 4)
{{{graph(300,200,-5,5,-5,5,x,2sqrt(x))}}}