Inequality solver

Solve linear, quadratic, and absolute value inequalities with interval notation.

Inequality

Solving inequalities

Same as equations, but flip the sign when multiplying/dividing by a negative.

Types

Linear: 2x − 3 > 7 → 2x > 10 → x > 5. Quadratic: Factor, find zeros, test intervals. Rational: Find critical points from numerator and denominator zeros.

Notation

x > 5 means (5, ∞). x ≤ 3 means (−∞, 3]. Use [ ] for ≤/≥, ( ) for .

Popular equations
2x + 4 = 10 3x − 7 = 20 5x + 2 = 17 x/2 + 3 = 9 x² + 5x + 6 = 0 x² − 4 = 0 x² − 6x + 9 = 0 2x² − 3x − 2 = 0
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