Factorise 16 x²+24 xy +9 y²
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We can wirte this as :
(4x) ² + 2 × 4x × 3y + (3x) ²
Using (a+b) ² = a² + b² + 2ab
Therefore, (4x + 3y ) ² Or (4x + 3y ) (4x + 3y )
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