SOLUTION: Can you help me here? If the square root of twice a certain number is subtracted from the number the result is 4. Find the number.

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Question 931112: Can you help me here? If the square root of twice a certain number is subtracted from the number the result is 4. Find the number.
Found 2 solutions by mananth, MathTherapy:
Answer by mananth(16946)   (Show Source): You can put this solution on YOUR website!

sqrt of twice a number=



square on both sides
(x-4)^2 =2x
x^2-8x+16=2x
x^2-10x+16=0
x^2-8x-2x+16=0
x(x-8)-2(x-8)=0
(x-8)(x-2)=0
x= 2 OR 8


Answer by MathTherapy(10552)   (Show Source): You can put this solution on YOUR website!

Can you help me here? If the square root of twice a certain number is subtracted from the number the result is 4. Find the number. 
The number is: 

You can do the check!! 

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