Math, asked by deep1029, 1 month ago

simplify: 3n²+n-[3(n-1)²+(n-1)]​

Answers

Answered by UtsavPlayz
2

3 {n}^{2}  + n - (3 \: ( {n}^{2}  + 1 - 2n) + n  -  1) \\  =  3 {n}^{2}  + n - (3 {n}^{2}  + 3 - 6n +  n - 1) \\  = 3 {n}^{2}  + n - 3 {n}^{2}  - 3 + 6n - n + 1 \\  = 6n - 2

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