SOLUTION: When the square of twice a positive number is doubled, the result is 450. What is the original number?

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Question 421725: When the square of twice a positive number is doubled, the result is 450. What is the original number?
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
2((2x)^2) = 450
2(4x^2) = 450
8x^2 = 450
x^2 = 450%2F8
x^2 = 56.25
x = sqrt%2856.25%29
x = 7.5 is the original number
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:
Check:
2(2*7.5)^2 =
2(15^2) =
2*225 = 450