Review Of Solving Trinomials References. This observation is the key to factoring trinomials using the technique known as the trial and error (or guess and check) method18. In general, ax2 + bx + c = (px + m)(qx + n) = pqx2 + pnx + qmx + mn = pqx2 + (pn + qm)x + mn.

Web 3m views 7 years ago. To find the terms that go in each bracket, look for a pair of. I'm going to start with prime numbers at first to ease you in.