Question 378510
plugging the points into the general equation will give you a system of three equations in a, b, and c
just solve the system for the three values


7 = a(-2)^2 + b(-2) + c ___ 7 = 4a - 2b + c


-2 = a(1)^2 + b(1) + c ___ -2 = a + b + c


3 = a(3)^2 + b(3) + c ___ 3 = 9a + 3b + c