About VerifySolve — the solver that proves its answers
VerifySolve is a free online math solver built on one idea: an answer you cannot check is just a claim. So every solution here is computed by a real math engine, shown step by step at no cost, and then verified — the answer is substituted back into your original problem, in front of you. No sign-up, no app, no paywall on the steps.
How the verification works
Most solvers ask you to trust the answer. VerifySolve shows you the check — the same plug-back check a careful teacher does — automated and printed on every single solution.
1
A math engine solves it
Your problem is parsed into exact fractions and symbols, then solved by a symbolic math engine applying named algebra and calculus rules. No language model guesses the answer, and there is no floating-point rounding drift in the working.
2
Every step is shown, free
The engine records each move it makes — subtract from both sides, factor, apply the chain rule — and prints them in order, the way a teacher writes on a board. The full working is never locked behind a paywall or a sign-up form.
3
The answer is plugged back in
Before you see a result, the engine substitutes it back into your original problem. Both sides must balance — or, for calculus, the answer must survive an independent numeric check. That proof is printed under every solution as the Verified card.
What “Verified” means
The green Verified card under a solution is the plug-back check itself: the answer, substituted into your original problem, with both sides shown balancing. Derivatives are checked against the function’s actual numeric slope; antiderivatives are checked by differentiating them back. If a result cannot be checked, the page says so instead of printing the badge.
Honest scope is part of the product. A solver that silently guesses outside its range is worse than one that admits its limits:
!No photo or handwriting input yet — problems are typed, which also means they are read exactly, never mis-OCR’d.
!Integrals by parts, definite integrals and partial fractions are not covered yet; the integral page says so on the page itself.
!Systems are two equations in two unknowns for now — three-equation systems are on the roadmap.
!Word problem families beyond distance-rate-time and mixture (percent, age, work, coin) are in development and labelled “coming soon”, not faked.
!When a problem is outside the engine’s scope, the solver tells you plainly instead of returning a confident wrong answer.
Free means free
The steps are the product, so the steps are never the paywall. There is no account to create, no trial counting down, and no “unlock the full solution” button. VerifySolve runs entirely in your browser — your problems are computed on your own device, not uploaded to a server.
Built for learning, not cheating
A solver can be a shortcut or a tutor; the design decides which. VerifySolve shows the method, prints the proof so you can check your own work, and offers “One like it” practice so the next problem is yours to solve. Use it to understand — and follow your school’s rules on homework and tests.