Vocabulary
the name for the unknown number that is represented with a letter
variable
2x + 5x =
3x + 9 = 30
x = 7
x2 = 400
x = +-20
m3 = 125
m = 5
the name for a number whose value will always remain the same (no variable)
constant
2x - 5x
-3x
4(2x-5) = 60
x = 10
d2 + 60 = 204
d = +-12
2n3 = -54
n = -3
the number in front of a variable in a variable term
EX: 5x (what is the 5 called?)
co-efficient
2x·5x
10x2
x/3 + 5 = 20
x = 5
3x2 / 5 + 9 = 24
x = +-5
a3 + 6 = 14
a = 2
Numbers, symbols and operations (such as + and ×) grouped together that represent the value of something
expression
x3·x5
x8
3x + 10 = 2x
x = 5
x2 + 3x - 40 = 0
x = -8, 5
x3 / 3 - 12 = - 3
x = 3
A mathematical expression that shows the value of the expression using an equal sign
equation
(x3)4
x12
2x/3 + 3 = x - 5
x = 24
a2 + 21a + 90 = 0
a = 6,15
5t3 + 46 = -370
t = -4.4