# Lesson Combining Like Terms by alicejenny

VIEWS: 4 PAGES: 8

• pg 1
```									Lesson 2.7
Combining Like Terms

Mr. Beltz & Mr. Sparks
Goal
   Simplify an expression by combining
like terms.
Vocabulary
   Like Terms: are terms in an expression that have the
same variable raised to the same power.

   Examples
 8x and 3x

Yes
2      2
 x and x

Yes
 x and 3x

Yes, why?
2      3
 1x and x

No, why not?
Practice: Identify the LT
   -5x2 – x + 8 + 6x – 10
   -x and 6x, 8 and -10

   -3x2 + 2x + x2 – 4 + 7x
   -3x2 and x2, 2x and 7x

*Remember the signs stay with the number to the right!
Simplifying Expressions
   8x + 3x =
   8x + 3x = 11x

   2y2 + 7y2 – y2 + 2=

   2y2 + 7y2 = 9y2
   9y2– 1y2 = 8y2
   8y2 + 2= 8y2 + 2
Student Practice
   P. 108 # 3-5

   Show original problem
   Show all work/steps
Distributing and Simplifying

Example:
5( x + 1 ) + 2( 4 － x )
5x + 5 + 2•4 － 2•x
5x + 5 + 8 － 2x
5x － 2x + 5 + 8
3x + 13

Example:
1 － 4( 1 － 2x)
1 + (－4)( 1 + -2x)
1 + (－4)(1) + (-4)(-2x)
1 + (-4) + 8x
-3 + 8x
Try These:
   Page 108 # 6, 7, 8

   Homework:
   Page 110 #16 – 38 even

   Day 2 – Page 110 # 15- 37 odd

```
To top