Question

(x+2y)²=x²+____+4y²​

Answer 1

(x+2y)²=x²+ 4xy +4y²

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Answer 2

$\color{red} \huge { \underline{ \underline{ \mathfrak{Answer}}}}$

$\bf\huge(x+2y)²$

$</p><p> \bf \: By \: using \: Identity$

$\bf \bigg(x + y \bigg)² = x² + 2xy + y²$

$\bf \bigg (x + 2y \bigg)² = x² + 2 × x × 2y + 2y²$

$\bf \qquad \qquad \qquad \: x² + 4xy + 4y²$