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Simplification of an Expression

3x-y2-43x-y+4

Question

$(3 x - y)^{2} - 4 (3 x - y) + 4$

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Solution

Consider the given expression,

$\Rightarrow {(3 x - y)}^{2} - 4 (3 x - y) + 4$

$\Rightarrow 9 x^{2} + y^{2} - 6 x y - 12 x + 4 y + 4$

$\Rightarrow 9 x^{2} + y^{2} - 6 x y - 12 x + 4 y + 4$

Hence, this is the answer.

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