N 2 6n 7 July 8, 2019 16 32 64 128 N 2 6n 7 0 N 2 6n 72 N 2 5 6n 7 Factor n 2 6n 7 N 5 )(- 3n 2 6n 7 N 4 n 3 6n 2 7n 21 2 1.5 n 4 )- 6n =- 7 2 n 6 2 n 7