SOLUTION: I'm really lost at math. It's been about 19 years and I'm back in college. College algebra has been given to me without taking a refresher course. I am ohhh so lost. I have a 2-par

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Question 28283: I'm really lost at math. It's been about 19 years and I'm back in college. College algebra has been given to me without taking a refresher course. I am ohhh so lost. I have a 2-part question and would appreciate if someone would show me step by step how to do these.
1)For the equation x-2 sqrt of x = 0, solve for all values of x that satisfies the question.
2)Graph the functions y=x and y=2 sqrt of x on the same graph (by plotting points if necessary). Show the points of intersection of these two graphs.
Thank you so much.
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
1) Solve:
x-2sqrt%28x%29+=+0 Subtract 2sqrt%28x%29from both sides of the equation.
x+=+2sqrt%28x%29 Now square both sides.
x%5E2+=+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%28x%29
The points of intersection are: (0,0) and (4, 4)
graph%28300%2C200%2C-5%2C5%2C-5%2C5%2Cx%2C2sqrt%28x%29%29