Definitions
Variables
A symbol that represents an unknown numeric value
2x + 6y + 7x
9x + 6y
Square root of 9
3
3x + 2 > 11
X > 3
6x + 7x
13x
Coefficient
A number multipled by a variable
3a + 8b + 5a
8a + 8b
Sqaure root of 485
22
5 < 2x - 1
X > 3
5x - 2 = 3x +4
X = 3
Polynomial
Expression containing several terms
a + 2b + a - b
2a + b
Square root of 523
23
5 - r < -8
r > 13
X=7
Independent variables
A variable whose variation doesn't depend on another
5a + 2b + 5a + 6b
10a + 8b
Sqaure root of 652
25
1/3x > 6
x > 18
8a - 5 = 11
A - 2
Dependent variables
A variable whose value depends on another
4x^2 + 1 - 4
4x^2 - 3
Sqaure root of 328
18
-10x + 2 < -18
x > 2
-10 + 6y = 34
Y = 4