28 =- 2 5x July 8, 2019 16 32 64 128 28 5x6 2 34 28 2 5x 28 31x 5x 2 7x 2 28 5x 28 31x 5x 2 factorization 2 5x 28 1 5x10 28 2 28 x 5 = 2 x 2 5
