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Patvarapa Rienchalan... ∙
(3n)(3n-1) = 3n * 3n - 3n * 1
Now, perform the multiplication:
(3n * 3n) = 9n^2
(3n * 1) = 3n
So, (3n)(3n-1) simplifies to:
9n^2 - 3n
Suzzain Aline ∙
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