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Factorise using appropriate identities : 16x^2 + 24xy + 9y^2

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Factorise using appropriate identities : 16x2 + 24xy + 9y2

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16x2 + 24xy + 9y2 

= (4x)2 + 2 (4x) (3y) + (3y)2 

= (4x + 3y)2 = (4x + 3y) (4x + 3y) 

[ ∵ (x + y)2 = x2 + 2xy + y2 ]

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