Unit 1 FM3 Day 4­­Factoring Part I completed.notebook

September 04, 2015

Methods of Factoring: 1. GCF ­ 

  always try first

2. Binomial? ⇒ Difference of two Squares? 3. Trinomial?⇒ Factor as two binomials?    

GCF Find a factor (numbers and/or variables) that you can take out of every  term.

1.  4x5 + 100

2.  5a2b3 + 10ab2

3.  24x2y3 ­ 8xy + 6x3y2

1

Unit 1 FM3 Day 4­­Factoring Part I completed.notebook

September 04, 2015

Difference of Two Squares: a2­b2 = (a­b)(a+b) perfect squares!

Difference of squares is the easiest to spot­ if you know your 

If you have a polynomial with two terms:  • check to see if both terms are perfect squares • check to see if you have the difference (subtraction) 1.  x2 ­ 25

2.  4x2 ­ 49

3. x2 + 36

4.  81x6 ­ 100

2

Unit 1 FM3 Day 4­­Factoring Part I completed.notebook

September 04, 2015

Trinomials ­ always factor into two binomials Use either guess and check or error/reducing method • If there is a leading coefficient on the x2 term, multiply it with the  constant term • Then determine what multiplies to the last term and adds to the middle  term • Reduce any factors Examples: 1.  3x2 + 10x + 8

3.  x2 ­ 3x ­ 10

2.  4x2 ­ 21x + 5

                            4.  x2 + 7xy + 10y2

5.  x2 + 10x + 21

Mixed Practice: 6.   6x2 + 7x ­ 3   

9.  3x2 + 9x ­ 54

  7.  4x2 ­ 64y2 

             8.  10x2 ­ 26x + 12

                   10.  16x2 + 100

3

Unit 1 FM3 Day 4­­Factoring Part I completed.notebook

September 04, 2015

4

Unit 1 FM3 Day 4 Notes completed--GCF,Diff Squ, Trinomial.pdf ...

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