In which case would it be best to use the “factoring method” to solve the trinomial equation?
x^2 + 4x = -­5
4.3x^2 + 2.4x -­ 3 = 0
x^2 ­ - 4x + 3 = 0

The best case would be to use factoring in the last equation because it has whole numbers that are "factorable," meaning that its c value has factors that evenly add up to its b value.
In this case, (x-3)(x-1). -1*-3=3 and -1+-3=-4