**Like Terms and Unlike Terms**

**1. Go over the exam problem one by one.**

**2. Terms, coefficient, and constant terms**

- The expression 2x – 3y + 8 consists of three terms. They are 2x, -3y and 8. The numerical part, including the sign, of a term is called the coefficient of the variable.
- Term 2x, the coefficient of x is 2
- Term -3y, the coefficient of y is -3
- Term 8, is called constant term

**3. Classify the like terms and unlike terms: explained in class**

**4. Simplify the algebraic expression by combining (or collecting) like terms**

- 2x + 3x = 5x
- 8y – 3y = 5y
- 3a + 4b – 2a + 5b = (3a -2a) + (4b +5b) = a + 9b

**5. Home Work:**

- Handout: two pages
- Workbook:
- page 21: 1, 2
- Page 22: 6, 9, 10

« Prev：Math 6A, Lesson 14, Fall 2017, 01/07/2018 Math 6A, Lesson 16, Fall 2017, 1/21/2018：Next »