The Gracie Method was made by the famous Gracie Worton It is a method used to solve quadratic equations. Once you have found the numbers that multiply to get the far left number and add to get the middle number you can see what sign is before the right number. The sign there (+ or -) is what goes before the biggest number out of the ones you found earlier and the sign before the far left number is if the sign stay the same through the answer or if they are different to each other.