retakes: -turn in quiz corrections -retakes thursday and friday at lunch, or as arranged before the...
TRANSCRIPT
Retakes: -Turn in quiz corrections -Retakes Thursday and Friday at lunch, or as
arranged before the end of next week.
Today’s Plan-Correct-Combining Like Terms review and practiceAssign. #212-9 Homework & Practice with Reteach or Challenge odds or evens on graph paper w/work
10/14/08 Like Terms Practice 2-9 #21
Terms in an expression are separated by + and –.
A term can be a number, a variable, or a product of numbers and variables.
7x + 5 – 3y2 + y + x3
term term term term
Coefficient: a number that is multiplied by a variable
Coefficient Variable
term
term
10/14/08 Like Terms Practice 2-9 #21
Like terms are terms with the same variable raised to the same power.
Constants, like 5, , and 3.2, are also like terms.
12
Like Terms
Unlike Terms
3x and 2x
5x2 and 2xThe exponentsare different.
3.2 and nOnly one term
contains avariable
6a and 6bThe variablesare different
w and w7 5 and 1.8
10/14/08 Like Terms Practice 2-9 #21
Insert Lesson Title Here
Course 2
2-9 Combining Like Terms
Identify like terms in the list.
2x 4y3 8x 5z 5y3 8z
Look for like variables with like powers.
Like terms: 2x and 8x 4y3 and 5y3 5z and 8z
2x 4y3 8x 5z 5y3 8z
Insert Lesson Title Here
Course 2
2-9 Combining Like Terms
x
Combining like terms is like grouping similar objects.
+ =x
x
x
x x
x x x
x x x x
x x x x x
4x + 5x = 9x
To combine like terms that have variables, add orsubtract the coefficients.
Combine like terms.
Course 2
2-9 Combining Like Terms
A. 6t – 4t
2t
6t and 4t are like terms.
Subtract the coefficients.
B. 45x – 37y + 87
In this expression, there are no like termsto combine.
Combine like terms.
Additional Example 2C: Combining Like Terms
Course 2
2-9 Combining Like Terms
C. 3a2 + 5b + 11b2 – 4b + 2a2 – 6
3a2 + 5b + 11b2 – 4b + 2a2 – 6
5a2 + b + 11b2 – 6
Identify liketerms.
Add or subtractthe coefficients.
(3a2 + 2a2) + (5b – 4b) + 11b2 – 6 Group liketerms.
Insert Lesson Title Here
Course 2
2-9 Combining Like Terms
Combine like terms.
C. 4x2 + 4y + 3x2 – 4y + 2x2 + 5
9x2 + 5
4x2 + 4y + 3x2 – 4y + 2x2 + 5
(4x2 + 3x2 + 2x2)+ (4y – 4y) + 5
Assignment:
2-9 Homework & Practice with Reteach or Challenge -odds or even (different than neighbor)-On graph paper -Show all work
Retakes: -Turn in quiz corrections first
10/14/08 Like Terms Practice 2-9 #21