Quick Check for Factoring Polyno
Quick Check for Factoring Polynomials
|CHECK FOR||Two||Three||Four or M|
|Greatest Common Factor|
|Grouping by Pairs|
| Difference of Squares
a2- b2 = (a + b)(a - b)
| Perfect Square Trinomial
a 2+2ab+b2 =(a+b)2
a2 -2ab+b2 =(a-b)2
| Grouping method
( Product / Sum method )
or Reverse FOIL
Points to Remember:
1. Always look for a GCF first, no matter how many terms are
in the polynomial .
2. A sum of squares is prime (unless there is a GCF).
3. You can only ‘insert’ the pair of numbers (found when
using grouping to factor a trinomial ), if the leading
coefficient is a 1.
4. Always write a trinomial in descending order (if there is
one variable ) before trying to factor using grouping or