SOLUTION: solve 2x=sqrt20+2x

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Question 782858: solve
2x=sqrt20+2x
Answer by oscargut(2103) About Me  (Show Source):
You can put this solution on YOUR website!
2x= sqrt(20+2x)
(2x)^2 = 20+2x
4x^2 = 2x+20
4x^2-2x-20=0
2x^2-x-10 = 0
x = 5/2 or x = -2
Answer: x = 5/2

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