Find the Squares of the Following: 9m - 2n - Mathematics

Find the squares of the following:
9m - 2n

बेरीज

Using (x + y)²
= x² + 2xy + y², we get
(9m - 2n)²
= (9m)² + 2(9m)(-2n) + (-2n)²
= 81m²- 36mn + 4n².

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