Can it solve cubic and quartic equations?

Yes. Higher-degree polynomial equations are solved numerically and accepted only after a residual check.

Does it solve systems of equations?

Yes. Put each equation on a separate line in the Advanced Solver.

Can it find numerical roots?

Yes. Numerical root workflows are available for equations that need an initial guess or bracket.

Advanced algebra and numerical solving

Equation Solver Online

Solve single equations, systems, polynomial equations and numerical root problems from one browser workspace, with verified polynomial roots through degree 8.

Open Advanced Solver

What this tool includes

Linear and quadratic equations with direct solutions
Polynomial equations through degree 8 with real and complex roots
Linear and nonlinear equation systems
Numerical root finding, limits, supported symbolic differentiation and integration

Common uses

Algebra and engineering mathematics coursework
Checking polynomial roots including complex solutions
Solving simultaneous equations
Testing numerical solutions when a closed form is not convenient

Examples you can try

x^3 - 1 = 0
x^4 - 5*x^2 + 4 = 0
x+y=5 and x-y=1
nsolve(cos(x)=x,x,0.7)

Frequently asked questions

Can it solve cubic and quartic equations?: Yes. Higher-degree polynomial equations are solved numerically and accepted only after a residual check.
Does it solve systems of equations?: Yes. Put each equation on a separate line in the Advanced Solver.
Can it find numerical roots?: Yes. Numerical root workflows are available for equations that need an initial guess or bracket.

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