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Section 3 Q17

17. If x≠0 and x = √(4xy – 4y^2), then, in terms of y, 
(A) 2y
(B) y
(C) y/2
(D) -4y^2 / (1-2y)
(E) –2y



Answer:A


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2 comments:

  1. UnknownSeptember 23, 2010 at 3:15 AM

    please provide explanation

    ReplyDelete
  2. HiteshSeptember 23, 2010 at 7:39 AM

    @ Silpa - This is nothing but a quadratic equation (x-2y)^2. Hence x = 2y.

    ReplyDelete

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