How do I find the value of a and b so I can determine

How do I find the quadratic equation from the following table of values: x | y 0 | 10000 3 | 7975 6 | 6400 9 | 5275 So I know y=ax^2+bx+c, and that C=10000, and the second difference of Y is 450, but note that the x value goes up in increments of 3, not 1. How do I find the value of a and b so I can determine the equation Thanks for all help 🙂

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