Solve the following:
Find the square by using identity $(2 x y + 5 y)^{2}$

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Solution

$\begin{matrix} {(2 x y + 5 y)}^{2} {(a + b)}^{2} = a^{2} + b^{2} + 2 a b {(2 x y + 5 y)}^{2} {(2 x y)}^{2} + {(5 y)}^{2} + 2 \times 2 x y \times 5 y 4 x^{2} y^{2} + 25 y^{2} + 20 x y^{2} \end{matrix}$

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Question 3(iii)
Find the following squares by using identities:
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