Here you can find free online equation solvers that help you solve linear, quadratic and cubic equations, equations of the fourth degree, systems of two and three linear equations. To solve systems with four or more variables you can use the universal calculator.
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Quadratic Equation Solver
A free solution to solve quadratic equations online. Just enter the coefficients a, b and c and solve your equation with one click. The roots may be real or complex.
The Quadratic Equation Solver can be used as the Linear Equation Solver if you set coefficient 'a' to zero.
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Cubic Equation Solver
A practical online equation calculator to solve any cubic equation online. Just enter your coefficients and click Solve.
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Advanced systems of equations solver
Solves systems of n linear equations with n unknowns. You can use this equation calculator to solve 2x2, 3x3, 4x4, 5x5, 6x6, 7x7, 8x8, 9x9, 10x10 and 11x11 systems of linear equations
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Solving equations tutorial
How to solve a quadratic equation
This is a step-by-step tutorial on using the quadratic formula and the discriminant to solve quadratic equations.
Learn how to use the quadratic equation discriminant to know the number and types of solutions.
Solving cubic equations with Cardano's method
How to solve a fourth degree equation (quartic equation)
Solve a system of linear equations using Cramer's rule
Solve a system of linear equations using Gaussian Elimination
Solve a system of two linear equations with substitution method
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