Chương II. §1. Phân thức đại số

Warmly welcome teachers to our class
ALGEBRA 8
Chapter II – ALGEBRAIC FRACTION
The main knowledges of this chapter
1. Algebraic fraction
2. The fundamental property of algebraic fractions
3. Simplifying algebraic fractions
4. Operations on algebraic fractions
Arithmetic fractions are built from integers
Algebraic fractions are built from....?
Lesson 1 ALGEBRAIC FRACTION
Lesson 1 ALGEBRAIC FRACTION
1. Definition
What is your comment of A and B in these expressions?
So, what is an algebraic fraction?
Lesson 1 ALGEBRAIC FRACTION
1. Definition
Note: 0, 1 are also algebraic fractions
Lesson 1 ALGEBRAIC FRACTION
Applying: In the following expressions, which is the algebraic fraction? Which is not? Explain why?
Arithmetic fractions are built from integers
Algebraic fractions are built from
Lesson 1 ALGEBRAIC FRACTION
polynomials
2. Equal fractions
Lesson 1 ALGEBRAIC FRACTION
2. Equal fractions
Who is right in your opinion?
Lesson 1 ALGEBRAIC FRACTION
Exercise 1
Using the definition of equal fractions, prove that:
Lesson 1 ALGEBRAIC FRACTION
EXERCISE
Exercise 2
Are three following fractions equal?
Lesson 1 ALGEBRAIC FRACTION
EXERCISE
A. x2 – 4x
B. x2 + 4
C. x2 + 4x
Exercise 3
Lesson 1 ALGEBRAIC FRACTION
Thank you for your attention!