first you must identify the ax^2+bx+c and we have them all here i will do 2 of them then you must do the last one lets start with t2-13t-30, do 2 times -30 which is -60, next list the first common multiple of 60 which is 1*60, then make the multiples smaller over time. 2*30, 4*15. thats as small as we can go since 15 cannot be broken down anymore. now the multiples have to equal -30 so we use the formula (-15)(2)=-30 and that should be your answer
