Find the square of : 2a + b - Vidyadip

Question

Find the square of $: 2a + b$

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Answer

We Know that
$( a + b )^2 = a^2 + b^2 + 2ab$
$(2a + b)^2 = 4a^2 + b^2 + 2 \times 2a \times b$
$= 4a^2 + b^2 + 4ab$

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