Quadratic equation calculator

Quadratic equations Équations de second degrée

Enter the equation you want to solve.

Instead of x², you can also write x^2.





Solve with the p,q-formula:


Or enter in here:
x2+ x+ =0





Solve with the quadratic formula:


Or enter in here:
x2+ x+ =0



This calculator solves quadratic equations by completing the square, This is a number you may add on both sides. Then you can use the binomial formula. A quadratic equation is an equation with a variable that may appear as square, i.e. in the form x².

Quadratic equations are solved by using the first or second binomial formula. Simply add a number, then use the binomial formula ""backwards"" (this technique is called completing the square).

Another technique is: use the general solution for quadratic equations of the kind x²+px+q. The p,q-formula gives those solutions.

Quadratic equations

Mathepower can solve quadratic equations step-by-step and for free. They can be solved by completing the square, the p,q-formula or the quadratic formula.