### Day 27 - Difference of Squares - 02.17.15

Updates
• Unit 3 Test this Friday, February 20th!
• Go over Quiz 3-1

Bell Ringer

1. Simplify the following:

1. none of the above

2. Factor the following: $\inline n^2-10n+25$

1. all of the above

2. none of the above

3. Factor the following:

1. all of the above

2. none of the above

4. Factor the following:

1. all of the above

2. none of the above

Review
• Prerequisites
• Prime Numbers
• Composite Numbers
• Factor
• Distributive Property
• Factoring (video 1) (video 2)
• Classifying Numbers as Prime or Composite
• Prime Factorization of a Positive Integer
• Prime Factorization of a Negative Integer
• Prime Factorization of a Monomial
• Finding the GCF of an Integer
• Finding the GCF of a Monomial
• Apply Factoring to Solve Problems
• Factoring and Distributive Property (video)
• Zero Product Property (video)
• Factor polynomials using the Distributive Property
• Factor by grouping
• Solve quadratic equations of the following form: $\inline ax^2+bx=0$
• Factoring Trinomials
• Factor trinomials of the form $\inline x^2+bx+c$
• Solve equations of the form $\inline x^2+bx+c=0$
• Factor trinomials of the form $\inline ax^2+bx+c$
• Solve equations of the form $\inline ax^2+bx+c=0$

Lesson

Exit Ticket
• Posted on board at the end of the block
Lesson Objective(s)
• How can factoring the difference of squares be used to solve equations?
Skills
• Factor using difference of squares
• Solve equations using graphing

#### In-Class Help Requests

Standard(s)
• CC.9-12.A.SSE.1a Interpret parts of an expression, such as terms, factors, and coefficients.

Mathematical Practice(s)
• #1 - Make sense of problems and persevere in solving them
• #2 - Reason abstractly and quantitatively
• #7 - Look for and make use of structure

Past Checkpoints

Unit Skills
1. Classifying Numbers as Prime or Composite
2. Prime Factorization of a Positive Integer
3. Prime Factorization of a Negative Integer
4. Prime Factorization of a Monomial
5. Finding the GCF of an Integer
6. Finding the GCF of a Monomial
7. Factor Applications
8. Factor polynomials using the Distributive Property
9. Factor by grouping
10. Solve quadratic equations of the following form: $\inline ax^2+bx=0$
11. Solve factored equations using Zero Product Property
12. Factor trinomials of the form $\inline x^2+bx+c$
13. Solve equations of the form $\inline x^2+bx+c=0$
14. Factor trinomials of the form $\inline ax^2+bx+c$
15. Solve equations of the form $\inline ax^2+bx+c=0$
16. Factor using difference of squares
17. Solve equations using graphing