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
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.