#### Constants

A collection of real numbers used in combination with variables using addition, subtraction, multiplication, and division to create an algebraic expression.

#### Conjugates

Two expressions that differ only in sign between the terms. The product of two conjugates is the difference of two squares.

#### Complex conjugates

Two pairs of complex numbers that differ only in sign between the terms. The product of two complex conjugates is the difference of two squares.

#### Completing the square

The process of adding $(b/2)^2$, which is the square of half of the coefficient of $x$ in the expression $x^2 + bx$, to the expression. Consequently, \({x^2} + bx + {\left( {\frac{b}{2}} \right)^2} = {\left( {x + \frac{b}{2}} \right)^2}\).

#### Cube root

When $n = 3$ in \(a = {b^n}\).

#### Coordinates

The numbers in an ordered pair that locate a point on a coordinate system.

#### Constant term

The number $a_0$ in a polynomial in $x$.

#### Consistent system

A system of equations with exactly one solution. The slopes of the lines are not equal.

#### Composite number

Integer greater than 1 with more than two factors.

#### Complex number

A number of the form $a + bi$ where $a$ and $b$ are real numbers.

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