A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the...
-
Upload
jared-greer -
Category
Documents
-
view
212 -
download
0
Transcript of A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the...
![Page 1: A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the coefficient x is the variable.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f125503460f94c2557c/html5/thumbnails/1.jpg)
Combining Like Terms
![Page 2: A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the coefficient x is the variable.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f125503460f94c2557c/html5/thumbnails/2.jpg)
A coefficient is the number part of a term that includes a variable.
Example: 2x
2 is the coefficient x is the variable
Coefficient
![Page 3: A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the coefficient x is the variable.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f125503460f94c2557c/html5/thumbnails/3.jpg)
4x + 8x +1
Coefficients are 4 and 8
Constant term
4x and 8x are like terms
![Page 4: A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the coefficient x is the variable.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f125503460f94c2557c/html5/thumbnails/4.jpg)
like terms: terms with the same variable or variables, raised to the same power.
Like terms can be combined by adding their coefficients.
Example: What do you get when you add the fruit shown?
Combine like terms
+ – +By combining apples with apples and oranges with oranges, you get...
+
1 apple
3 apples + 2 oranges – 2 apples + 2 oranges
+ 4 oranges
coefficients
![Page 5: A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the coefficient x is the variable.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f125503460f94c2557c/html5/thumbnails/5.jpg)
What’s the “same” term mean? ◦If numbers have a variable, then you can combine only ones that have the same variable
◦You can also combine numbers that have no variables
Only combine terms that are exactly the same!!
![Page 6: A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the coefficient x is the variable.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f125503460f94c2557c/html5/thumbnails/6.jpg)
Which numbers are the “same”?
5x, 8y, 9z, 10, 12x, 14z, 7
Same: 5x and 12xSame: 10 and 7Same: 9z and 14zSame: 8y
Examples
![Page 7: A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the coefficient x is the variable.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f125503460f94c2557c/html5/thumbnails/7.jpg)
Terms in an algebraic expression are separated by addition or subtraction signs.
How many terms are in this expression?
The sign in front of each coefficient goes with that term.
![Page 8: A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the coefficient x is the variable.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f125503460f94c2557c/html5/thumbnails/8.jpg)
Find the like terms, combine their coefficients...
2x + 3y + 5x + 6y + 12
7x + 9y + 12
Example: Simplify 3x – 3y – 8x – yThis is the same as 3x – 3y – 8x – 1y
= – 5x – 4y
Example: Simplify 2x + 3y + 5x + 6y + 12
![Page 9: A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the coefficient x is the variable.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f125503460f94c2557c/html5/thumbnails/9.jpg)
Example:
Reorder the terms.
Combine like terms.
![Page 10: A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the coefficient x is the variable.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f125503460f94c2557c/html5/thumbnails/10.jpg)
Combine like terms.
Identify like terms.
Combine coefficients: 14 – 5 = 9
A. 14a – 5a
9a
B. 7y + 8 – 3y – 1 + y Identify like terms ; the coefficient of y is 1, because 1y = y.
5y + 7 Combine coefficients:
7 – 3 + 1 = 5 and 8 – 1 = 7
![Page 11: A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the coefficient x is the variable.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f125503460f94c2557c/html5/thumbnails/11.jpg)
Combine like terms.Identify like terms; the coefficient of q is 1, because 1q = q.
Combine coefficients: 4 – 1 = 3
Identify like terms; the coefficient of c is 1, because 1c = c.
6
3q
C. 4q – q
D. 5c + 8 – 4c – 2 – c
Combine coefficients:
5 – 4 – 1 = 0 and 8 – 2 = 6
![Page 12: A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the coefficient x is the variable.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f125503460f94c2557c/html5/thumbnails/12.jpg)
E. 4m + 9n – 2
4m + 9n – 2
Combine like terms.
No like terms.
F. 5m – 7m – 8 + 4
-2m – 4
![Page 13: A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the coefficient x is the variable.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f125503460f94c2557c/html5/thumbnails/13.jpg)
Remember, to simplify an expression means to perform all possible operations, including combining like terms.
In other words, simplify means solve!
![Page 14: A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the coefficient x is the variable.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f125503460f94c2557c/html5/thumbnails/14.jpg)
1. 4x + 5y – 2x + 3y 2. 5x + 5y + 2x + 2y
3. 3 + 5x – 4y + 2y – 8x
Final Problems:
2x + 8y
7x + 7y
3 – 3x – 2y
![Page 15: A coefficient is the number part of a term that includes a variable. Example: 2x 2 is the coefficient x is the variable.](https://reader036.fdocuments.us/reader036/viewer/2022083005/56649f125503460f94c2557c/html5/thumbnails/15.jpg)
Practice:worksheet