This page will try to solve a quadratic equation by factoring it first. How does this work? Well, suppose you have a quadratic equation that can be factored, like. Learn how to solve quadratic equations like (x-1)(x+3)=0 and how to use factorization to solve other forms of equations. MIT grad shows how to solve any quadratic equation by factoring. To skip to the shortcut trick, go to time. So we're looking for two numbers whose product-- let's call those a and b-- is going to be equal to 4 times negative 15, or negative Computing Computer programming Computer science Hour of Code Computer animation. And then if we take negative 8 plus 7, that is equal to negative 1, which is exactly the coefficient right. Solving quadratics by factoring: My product is negative.