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# Need help with this question.

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Need help with this question. [#permalink]

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06 Dec 2003, 10:34
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Hi,
Can someone give me a detailed explanation for this question.

Thanks,

1) If x not equal to 0 and x = the square root of 4xy-4y^2, then in terms of y, x =
a) 2y b)y c)y/2 d)-4y^2/1-2y e)-2y
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06 Dec 2003, 13:41
Because of the fact that X<>0
X^2 тАУ 4xy + 4Y^2=0

Then
(X-2Y)^2=0

=> X-2Y=0
X=2Y

06 Dec 2003, 13:41
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