Question

Compute 3m-2n square

Answer 1

As we know (a-b)²=a²+b²-2ab
So (3m-2n)²=(3m)²+(2n)²- 2*3m*2n
=9m²+4n²-12mn

Answer 2

$\mathcal{\huge{\purple{\star\:Hayy \: Mate...!! \:\star}}}$


(a - b ) ² = a² - 2ab + b²

( 3m - 2n)² = 3m ² - 3m+2n + 2n²
= 9m - 6mn + 4n

Or

3m - 2n²
= 3m - 4n

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