Answer:
A C D
Step-by-step explanation:
A prime Trinomial is one that cannot be reduced into integer factors. It is easier to define a non prime trinomial first.
x^2 - 4x - 12 can be factored into
(x - 6)(x + 2) -6 and 2 are integers.
So B is not prime.
All of the others are prime. You need to use the quadratic formula to solve them.
B factors into
x^2 - 13x + 42
(x - 7)(x - 6)
