i'm stuck on this problem.

i used the ac theory like this

14x^2 -20x +6

a=14 b= -20 c=6

ac=14(6)=48

b= -20

there are no two numbers that will multiply together and get 48 and at the same time be added together to get -20

i also tried to just factor by using 2 to get 7x^2 - 10x +3 and i ran into the same problem.

can someone please help me?