Solution (interval notation)—
Step by step
Solve a linear or quadratic inequality in one variable — the solution is shown in interval notation and drawn on a number line.
Step by step
Type an inequality in one variable to get the solution set and its number line.
Type it with one relational sign — for example 2x + 3 < 7 or x² − 4 ≥ 0. Both sides may hold expressions.
The answer is given in interval notation, using round brackets for excluded (strict) bounds and square brackets for included ones.
The solution is drawn on a number line: filled dots are included boundary points, hollow dots are excluded, and the shaded part is the solution.