INSTRUCTORS Carleen Eaton Grant Fraser Eric Smith

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### Factoring the Difference of Two Squares

• The special rule for factoring the difference of two squares is a2 – b2 = (a + b)(a – b).

• Sometimes, this rule needs to be applied more than once to completely factor the original polynomial.

• Some polynomials require several methods to be factored completely. Always start by finding the Greatest Common Factor. Then try other methods.

• You can solve some quadratic equations by factoring the trinomial and then using the zero product property.

### Factoring the Difference of Two Squares

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

• Intro 0:00
• Difference of Two Squares 0:40
• Example
• Factoring Using Several Techniques 3:33
• Solving Equations 4:11
• Lecture Example 1 4:55
• Lecture Example 2 6:05