Math, asked by dasdukhin, 6 hours ago

(3m–n)²– ( m – 2n )² ​

Answers

Answered by luvolivia208
1

Step-by-step explanation:

(3m)²–2.3m.n+(n)²–(m)²–2.m.2n+(2n)²

9m²–6mn+n²–m²–4mn+4n²

9m²–m²–6mn–4mn+n²+4n²

8m²+10mn+5n²

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