Vocabulary
A value represented by a letter
Variable
2x + 5 + 4x
6x + 5
20b - 16 - 5b
15b - 16
20a + 5 - 6a
14a + 5
2x and -3x
Like terms
A number before a variable
Coefficient
-2x + 4x + 2x
4x
12x - 9x - 2x
x
15a + b - 10a
5a + b
2xc and 2c
not like terms
A number, variable, or a product of numbers and variables
Term
6x + 12 + 8x + 3
14x + 15
6a - 19b - 16a
-10a - 19b
20a + 10a - 3a
27a
16xy3 and -63xy2
not like terms
Terms with the identical variables and exponents
Like Term
13x + 14y + 7x + 2y
20x + 16y
15x - 20x - 18y - 2y
-5x - 20y
10x + 16y - 17x + 14y
-7x + 30y
4x and -24x
like terms
Also called "the power"
Exponent
-5x2 + 8x + x + 5x2
9x
17x2 - 3x - 4x2 - 2x
13x2 - 5x
16x2 - 9x + 4x2 - 10
20x2 - 9x - 10
13cxy2 and 17yxc2
not like terms