(a+b)(a-b)=a²-b² 公式
Grade 12th Grade · Math · 45 min· 记住该公示内容，能用平方差公式进行简便运算，会判断什么时候能用平方差公式
What's Included
Learning Objective
我可以使用 (a+b)(a-b)=a²-b² 公式来简化代数表达式。
Warm-Up Video
Mometrix Academy · 4:34
Factoring the Difference of Squares
Guided Notes
3 key concepts
- 1
The difference of two squares pattern is a² - b² which factors to (a + b)(a - b).
- 2
To factor a difference of squares, take the square root of both terms and write them as a sum and a difference: (a + b)(a - b).
- 3
When factoring 4y² - 16, the square root of 4y² is 2y and the square root of 16 is 4, so the factored form is (2y + 4)(2y - 4).
Practice Questions
10 questions · Multiple choice & Short answer
Exit Ticket
Quick comprehension check
“使用公式 (a+b)(a-b)=a²-b² 来简化表达式：9x² - 25”
Complete Lesson Package
Get all 3 ready-to-use resources:
Teacher Guide
Student Doc
Slides
