factorise 4x^2+4xy+y^2 using identity a^2+2ab+b^2=(a+b)^2
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Step-by-step explanation:
(a+b)² = a² + 2ab + b²
4x² + 4xy + y²
(2x)² + (2×2×y) + (y)²
(2x + y)²
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