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hi there and welcome to another video from Hegarty maths its mr. Haggerty here and in this video Im gonna show you some more calculator skills via GCSE and a-level maths in particular a little help to check your factorizing of quadratic expressions okay so this video like I said I want you to be able to use the calculator to check a factorization of a quadratic expression not to do it as such but to check you havent made a mistake in it in an exam so imagine you are asked to factorize the following okay imagine youre asked to factorize this expression here you should know how to do this its two numbers that multiply to 12 okay and add up to positive 7 and the numbers are at positive 3 and positive 4 so we would factorize that as X plus 3 X plus 4 no problems okay now just by way of an example theres no need to check this one in an exam because its quite straightforward but just to show you how it works you get your calculator mode equation is a quadratic equation we have a is eq