$(x - 2 y) (x - 2 y) =$

x^{2} + 4 y^{2} - 4 x y

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x^{2} + 4 y^{2} + 4 x y

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x^{2} + 4 y^{2} + 8 x y

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x^{2} + 4 y^{2} - 8 x y

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Solution

The correct option is B $x^{2} + 4 y^{2} - 4 x y$
$(x - 2 y) (x - 2 y)$
$= x^{2} + 4 y^{2} - 4 x y$

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