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hello and welcome to this dot cross maths key scale video on completing a table of values for a quadratic graph now we have an equation here where we have y in terms of x and this is known as a quadratic expression because the highest power of x here is 2 it has this x squared term and we want to be able to complete a table of values so that we can subsequently draw what this graph looks like and all we need to do is just take each of these values of x given to us and then substitute it into this equation to work out what y is so y will be equal to that x value squared plus two times that x value minus three so lets do that for each of these missing values some of these values have already been entered in for us lets do it with the x as minus three now if x is minus three if we substitute it into here we have y is equal to minus three squared plus two times minus three and then subtract three theres a few things to note here notice that i put the minus three in brackets and the rea
