Using the standard formulae, expand: (2 5 x+5 6 y )^2 - Vidyadip

Question

Using the standard formulae, expand:
$\left(\frac{2}{5} x+\frac{5}{6} y\right)^2$

✓

Answer

$\frac{4}{25} x^2+\frac{25}{36} y^2+\frac{2}{3} x y$

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