12345678910111213
of 13

Harder Trinomials - Undoing FOIL

YOUR TURN:

Factor   3x^2 - 4x - 7

Factor   5x^2 + 36x + 7

Let's make it a little harder...

Factor  2x^2 - x - 6

Our only choice for the first guy is

1 * 2 gives ( x ) ( 2x )

Since 6 is not prime, we have more choices to worry about:

1 * 6 and 2 * 3

But... which pair and in what order?