letsa15 letsa15 Today at 4:01 AM Mathematics Answered Multiply and simplify 3a(4a^2 - 5a + 12)A) 7a^2 - 2a + 15B) 12a^2 - 15a + 36C) 12a^3 -15a^2 + 36aD) 7a^3 - 2a^2 + 15a