Factorise $: 4 x^{2}+4 x y-3 y^{2}$

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

$=4 x^{2}+6 x y-2 x y-3 y^{2}$

$=2 x(2 x+3 y)-y(2 x+3 y)$

$=(2 x+3 y)(2 x-y)$

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