If x-2- y-1- then the value of x2-4 x y-4 y2 isA- 0B- 1C- -1D- 2

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Zeroes of a Polynomial

If x=2, y=-1,...

Question

If x =2, y = -1, then the value of $x^{2} + 4 x y + 4 y^{2}$ is

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