FACTORING A QUADRATIC TRINOMIAL USING THE REVERSENUMBER, THE INEQUA...

2. Factoring a quadratic trinomial using the reverse

number, the inequality symbol changes direction.

of FOIL:

Example

y

²

− y − 12 = (y − 4) (y + 3) and

10 > 5 but if you multiply by −3,

z

²

− 2z + 1 = (z − 1)(z − 1) = (z − 1)

²

(10) − 3 < (5)−3