taralynn2947 taralynn2947 26-01-2018 Mathematics contestada Find the complete factorization of the expression. 12xy + 21xyz + 45xz A) xyz(12 + 21 + 45) B) 3x(4y + 7yz + 15z) C) x(12y + 21yz + 45z) D) 3(4xy + 7xyz + 15xz)