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Enter expression, e.g. (x^2-y^2)/(x-y)

Enter expression, e.g. x^2+5x+6

Enter expression, e.g. (x+1)^3

Enter a set of expressions, e.g. ab^2,a^2b

Enter equation to solve, e.g. 2x+3=4

Enter equation to graph, e.g. y=3x^2-1

Depdendent Variable

Number of equations to solve:

Equ. #1:

Equ. #2:

Equ. #3:

Equ. #4:

Equ. #5:

Equ. #6:

Equ. #7:

Equ. #8:

Equ. #9:

Solve for:

Enter inequality to solve, e.g. 2x+3>4

Enter inequality to graph, e.g. y<3x^2-1

Dependent Variable

Number of inequalities to solve:

Ineq. #1:

Ineq. #2:

Ineq. #3:

Ineq. #4:

Ineq. #5:

Ineq. #6:

Ineq. #7:

Ineq. #8:

Ineq. #9:

Solve for:

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Absolute Value

The absolute value of a number is the distance of that number from zero on a number line. We use vertical bars to indicate absolute value.

For example, the absolute value of 8 is written |8|.

On the number line, we see that |8| = 8 since the distance from 8 to 0 is 8 units.

Similarly, |8| = 8 since the distance from -8 to 0 is also 8 units.

Since distance cannot be negative, the absolute value of a number is always nonnegative. That is, the absolute value of a number is always 0 or positive.