Find the square of 2x − 5y - Vidyadip

Question

Find the square of $2x − 5y$

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Answer

$(2x − 5y)^2 $
$= (2x)^2 + (5y)^2 − 2 \times 2x \times 5y$
$= 4x^2 + 25y^2 − 20xy$

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