factorising 6a+15 20b-12 24-4c 9a+18b 4p+28q+12r 63a-27b-9c 9p+15q+21r 12s-28t+8u
factorising 6a+15 20b-12 24-4c 9a+18b 4p+28q+12r 63a-27b-9c 9p+15q+21r 12s-28t+8u
factorising 6a+15 20b-12 24-4c 9a+18b 4p+28q+12r 63a-27b-9c 9p+15q+21r 12s-28t+8u
factorising 6a+15 20b-12 24-4c 9a+18b 4p+28q+12r 63a-27b-9c 9p+15q+21r 12s-28t+8u