Stuck on factorising? Type in your quadratic and we'll show you step-by-step how to factorise it—or use completing the square. FOIL and grid method included. Free, no sign-up. More help: GCSE maths revision & walkthroughs · Expand quadratics
Factorise any quadratic (e.g. -x²+5x-6, x^2-4, 2x²+3x+1). Get a full maths walkthrough with step-by-step working. If it factorises nicely you get the brackets; if not we use completing the square. We show the FOIL method and grid method too. The reverse of this is expanding quadratics. Part of our free GCSE maths revision tools.
Use x² or x^2 for the squared term. You can use + or - between terms (e.g. x^2-4, 2x^2+3x+1).