AI Inequality Solver

Flip the sign correctly. Any inequality, solved.

AskSia solves any inequality step-by-step: linear, quadratic, polynomial, absolute-value, rational, or compound. Sign flips on negative multiplication are handled automatically, and the solution is shown graphed on a number line, in interval notation, and in set-builder notation.

Works with word problems, equations, code, and science prompts.
∫ 3x² · sin(x) dx
SubjectsCalculusAlgebraPhysicsChemistryBiologyCSStatisticsEcon
4.9 / 5 · trusted by 2M+ students · 50M+ problems solved
Quick Answer

What is the AskSia inequality solver?

The AskSia inequality solver is an AI tool that handles every kind of inequality in HS and college algebra: linear (3x + 5 > 11), quadratic (x² minus 4 ≥ 0), polynomial (x³ minus x > 0), absolute-value (|x minus 2| < 3), rational (with x in the denominator), and compound (with AND, OR, or three-part like -3 < x < 5). AskSia handles the tricky parts (flipping the sign when multiplying by a negative, test points for non-linear inequalities, undefined points for rational inequalities) automatically. The solution is returned graphed on a number line and written in interval and set-builder notation.

98%
solution accuracy
50M+
problems solved
~1.5s
avg solve time
A+
study-ready explanations
Why AskSia Solver

Inequalities, with every tricky part handled.

Sign flips, test points, undefined points. The places where inequality mistakes happen most are the places AskSia handles automatically.

Auto-flips on negative multiplication

When you multiply or divide both sides by a negative number, the inequality sign flips. AskSia flips it automatically and labels the step explicitly: 'multiplying by -2 flips ≤ to ≥.' Useful since this is where most students lose points.

Sign flips handled

Test-point method for non-linear

For quadratic, polynomial, and rational inequalities, AskSia finds the critical points (roots and undefined points), splits the number line into intervals, and tests a point from each interval. The intervals where the inequality holds are the solution.

Test-point method

Absolute-value rewritten as two cases

Absolute-value inequalities |X| < a become -a < X < a, and |X| > a become X < -a OR X > a. AskSia rewrites the inequality, solves each case, and combines correctly using AND or OR.

Absolute value handled

Rational inequality undefined points

For inequalities with x in the denominator, AskSia identifies where the denominator is zero (those points are excluded from the solution), then uses the test-point method on the remaining intervals.

Undefined excluded

Compound: AND, OR, three-part

Compound inequalities like -3 < x AND x ≤ 5, or written as -3 < x ≤ 5, are handled with both bounds tracked. OR-type compounds give two disjoint solution sets.

Compound handled

Solution in three forms

Every solve returns the solution graphed on a number line (with open or closed circles), in interval notation like (-∞, -3) ∪ [2, ∞), and in set-builder notation like {x : x < -3 or x ≥ 2}. Match whichever your assignment asks for.

Three notations
How It Works

Three taps to a solved inequality.

Step 01

Capture the inequality

Snap a photo, paste, or type the inequality into the built-in calculator. AskSia reads <, ≤, >, ≥, and absolute-value notation correctly.

Input mode
Snap a Photo
Textbook, handwriting, screenshot
Paste Text
Word problem or equation
Calculator
LaTeX-ready equation editor
Step 02

Watch Sia solve step-by-step

AskSia isolates the variable (linear), uses test points (non-linear), or splits into cases (absolute-value). Sign flips are labeled explicitly when they occur.

Calculus · Step 4 of 4
1.4s
1
Set curves equal
x² = 2x → x = 0, x = 2
2
Set up the integral
A = ∫₀² (2x - x²) dx
3
Evaluate
A = [x² - x³/3]₀² = 4/3
Step 03

See the solution three ways

The solution is graphed on a number line, written in interval notation, and written in set-builder notation. Use whichever form your homework asks for.

Auto-generated diagram
Region between y = 2x and y = x² — area = 4/3
Available On

Solve anywhere
you study.

Every solve syncs across Web, iOS, and Android — start it at your desk, finish on your phone.

Web App

Full study studio

Split-panel interface with the worked solution on the left, the auto-generated diagram and AI tutor chat on the right.

Drag & drop image upload + LaTeX equation editor
Auto-generated diagrams render alongside steps
Side-panel AI tutor chat for hints and alt methods
Export to PDF, DOCX, Notion, or Google Docs
app.asksia.ai/solver
Hi! What are we studying today?
Ask about your homework, lecture, or readings...
Calculus
98% verified
1.4s
Step 4 of 4 · Evaluate
A = [x² - x³/3]₀² = 4/3
Mobile App

Snap & solve, anywhere

Open the camera, frame the problem, and the worked solution plus diagram appear in seconds.

One-tap snap-and-solve on iOS and Android
Pinch-to-zoom diagrams, swipe between steps
Auto-sync solves with your Web library
Offline review of saved solutions and flashcards
AskSia
+
What can I do for you?
Homework solver
Live transcribe
File summary
Snap
YouTube
Flashcard
Calc
98%
1.4s
Area between y=2x & y=x²
A = 4/3 sq. units ✓
Use Cases

Every inequality type, covered.

📐

Linear inequalities

Solve for x in inequalities like 3x + 5 > 11. AskSia handles the algebra with sign flips on negative multiplication, and graphs the solution on a number line.

Linear
⚛️

Quadratic and polynomial inequalities

Inequalities like x² minus 4 ≥ 0 or x³ minus x > 0. AskSia finds the roots, splits the number line into intervals, and tests each interval to identify the solution.

Quadratic, polynomial
🧪

Absolute-value inequalities

Inequalities like |x minus 2| < 3 or |2x + 1| ≥ 5. AskSia rewrites as a compound inequality (AND or OR depending on the direction) and solves each case.

Absolute value
🧬

Rational inequalities

Inequalities like (x minus 1)/(x + 2) > 0. AskSia identifies critical points (zeros of numerator and denominator), excludes undefined points, and uses test points.

Rational
💻

Compound inequalities

Three-part inequalities like -3 < 2x + 1 ≤ 5, plus AND/OR compounds. AskSia tracks both bounds simultaneously and graphs the combined solution.

Compound
🎯

Systems of inequalities (2D)

For 2D inequalities like y ≤ 2x + 1 AND y > -x + 3, AskSia graphs both regions and shades the intersection, useful for linear programming.

Systems 2D
Compare

AskSia vs. ChatGPT,
Photomath & Symbolab.

General chatbots hallucinate. Photo solvers stop at math. AskSia is built for actual coursework with verified accuracy, visual learning, and every subject.

Feature comparison between AskSia Solver and alternatives
FeatureAskSia SolverChatGPTPhoto Solvers
Solution accuracy✓ 98%~70-85%, hallucinations~90%, math only
Auto-generated diagrams✓ Every solveInconsistent / brokenGraphs only, math-only
Step-by-step explanations✓ Numbered + plain EnglishInconsistent depth✓ Math steps
Subject coverage✓ Math, Physics, Chem, Bio, CS, Econ✓ Wide but unverifiedMath only
Photo input✓ Handwriting + diagrams + codePhotos OK, weak on handwriting✓ Math photos only
Answer verification✓ Self-checked before displayNo verificationMath engine only
Tutor follow-ups✓ Hints, alt methods, ELI5✓ General chatNot available
Practice and flashcards✓ One-tap from any solveManual promptingNot available
Code debugging✓ Python, Java, C++, SQL...✓ YesNot available
Free to start✓ Daily solves, no cardLimited model accessSteps locked behind paywall
FAQ

Frequently asked questions.

When does the inequality sign flip?
The inequality sign flips when you multiply or divide both sides by a negative number, and also when you take the reciprocal of both sides (if both sides have the same sign). For example, -2x > 6 becomes x < -3 after dividing both sides by -2 (the > flips to <). AskSia handles this automatically and labels the step explicitly so you can see when and why the flip occurred. The sign flip is the most common place students lose points on inequality problems, and AskSia catches it every time.
How does AskSia solve quadratic inequalities?
AskSia uses the test-point method. First, solve the corresponding equation (set the quadratic equal to zero) to find the roots, which are the critical points. These roots split the number line into intervals (typically three: less than the smaller root, between the roots, greater than the larger root). AskSia tests one point from each interval by plugging into the original inequality. The intervals where the inequality holds are the solution set. The roots are included (closed circles) for ≤ or ≥, excluded (open circles) for < or >.
How does AskSia solve absolute-value inequalities?
AskSia rewrites the absolute-value inequality as a compound inequality based on the direction. |X| < a becomes the compound -a < X < a (an AND case, where both bounds must hold). |X| > a becomes X < -a OR X > a (an OR case, where either holds). For mixed forms like |X| ≤ a, the same rules apply with ≤ instead of <. AskSia then solves each piece of the compound inequality and combines them correctly. The final solution is graphed on a number line with the right open/closed circles.
What's the difference between interval notation and set-builder notation?
Interval notation writes the solution as a range with brackets: [2, 5] means 2 ≤ x ≤ 5, while (2, 5) means 2 < x < 5. Brackets are inclusive (filled circle on number line), parentheses are exclusive (open circle). Multiple intervals are joined with ∪ (union). Set-builder notation describes the solution as a set: {x : x ≥ 2} or {x : -3 < x ≤ 5}. AskSia returns the solution in both forms on every solve, so you can match whichever your textbook or assignment requires.
How accurate is AskSia?
AskSia hits 98% accuracy on standard high school and college coursework, measurably higher than ChatGPT, Photomath, and Symbolab on the same problem sets. Accuracy comes from subject-specialized models, a symbolic verification pass that catches arithmetic errors, and a self-check step that re-derives the answer before showing it to you.
Can I get practice problems and flashcards?
Yes. After any solve, ask Sia to generate similar practice problems at SAT, ACT, AP, IB, or college difficulty, or build a flashcard set on the underlying concept in one tap. Useful for exam prep and spaced repetition before a quiz, midterm, or final.
How much does AskSia cost?
AskSia has a free plan that includes daily solves across all subjects. AskSia Pro and Super include unlimited solves, advanced subjects, the full AI tutor companion, exports, and priority response speed. See pricing for details.
Start Today

Any inequality. Sign flips and all.

Join 2M+ students using AskSia to solve linear, quadratic, absolute-value, rational, and compound inequalities, with sign flips handled automatically and the solution shown in three forms.

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