Answer:x² + bx + c is a trinomial ax² +bx + c is also trinomial. a, b and c represents the number in the that trinomial. for example, x² + 11x + 28a = 1 b = 11 c = 28how to factor: x² + 11x + 28(x + 7)(x+4)find a number that if you add it together will result to b (in this case is number 11). and if you multiply it together will result in c (which is 8)