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) (Show Source): You can put this solution on YOUR website!
2((2x)^2) = 450
2(4x^2) = 450
8x^2 = 450
x^2 =
x^2 = 56.25
x =
x = 7.5 is the original number
:
:
Check:
2(2*7.5)^2 =
2(15^2) =
2*225 = 450
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