# Factoring

Common Factoring

Brief video with Common Factoring examples here

Difference of Squares Factoring

Brief video with Difference of Squares Factoring examples here

Factoring by Grouping

Brief video with Factoring by Grouping examples here

Trinomial Factoring

Part I:  Trinominal Factoring Where the Leading Coefficient is 1

1.   Factor each of the following trinomials:

a)   x^2 + 9x + 14                     b)   x^2 - 11x + 30                       c)    x^2 + 4x - 45                           d)   x^2 - x - 42

Solutions to these questions can be found at http://www.youtube.com/watch?v=zbdxMp3tFDw&list=UUm-Z_cRxySqM3GkXMKmDPUg&index=30&feature=plcp

Part II:  Trinomial Factoring Where the Leading Coefficient is not 1 and does factor out  (i.e., common factor first)

1.    Factor each of the following trinomials:

a)   3x^2 + 18x + 27               b)   -2x^2 + 10x - 12                      c)   4x^2 + 4x - 288               d)   -x^2 + x + 2

Part III:  Trinomial Factoring when Leading Coefficient not 1 and does not factor out

Three methods of attacking these problems are

Different people will attack these problems differently.  It's probably wise to try the method of decomposition for particularly challenging problems.

Some more opportunities are included below with quick video solutions using each of the methods described above.  Try them before clicking on the video solutions :)

Method of Decomposition (Quick Videos)

Criss-Cross Method (Quick Videos)

Method of Trial and Error (Quick Videos)