2. Twins, Triplets, Quadruplets, Quintuplets, etc. Combining Like Terms

3. Combining “Like Terms” Like terms are numbers or letters that are the same and can be grouped together. Add or subtract them to group them up.

4. 3 – 9d – 6d – 16d Step 1 If you have any subtractions signs in the problem, do “Keep, Change, Opposite” to make the entire problem ADDITION. The problem becomes: 3 + - 9d + - 6d + - 16d

5. Step 2 Combine “like terms.” Several terms have the variable “d.” They can all be combined. - 9d + - 6d + - 16d = - 31d

6. Step 3 Rewrite the expression. 3 + - 31d

7. 7 + 4n – 7n 2 – 3 + 8n + 4n 2 Step 1 – Change all subtraction to addition. – 7 + 4n + - 7n 2 + – 3 + 8n + 4n 2 Step 2 – Combine like terms – 7 + – 3 = – 4n + 8n = – - 7n 2 + 4n 2 = 4 12n -3n ²

8. Step 3 – Rewrite the expression (highest exponent first) – -3n² + 12n + 4

9. Practice, Practice, Practice… 1.4x² + 3x + 2x + - 6x² 2. - 14j - 7b + 8j + 10 3.3b² - 6b + 9b² + 5b + - 3b = - 2x² + 5x = - 6j + - 7b + 10 = 12b² + - 4b