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.**