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If x≠0 and x=sq rt (4xy-4y2), then, in terms of y, [#permalink]
 09 Feb 2004, 12:17
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17. If x≠0 and x=sq rt (4xy-4y2), then, in terms of y,
(A) 2y
(B) y
(C) y/2
(D) -4y2/1-2y
(E) тАУ2y
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Manager
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Can you elobrate on that..I tried to square it too..But didnt get the desired results.
Thanks
_________________
Attain Moksha
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X^2 = 4XY - 4Y^2
X^2 - 4XY + 4Y^2 = 0
(X - 2Y)^2 = 0
or
X - 2Y = 0
X = 2Y
Hope, this helps!
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Manager
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Thanks, Dont believe I couldnt solve that one..
Thanks again...
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