Posted by Ted on .
find the equations of the quadratics given the following information
zeros of 5 and 9
an optimal value of 2
using the formula y=a(xs)(xt)

math 
Reiny,
we can start with
y = a(x5)(x9)
the vertex , where the function has an optimal value of 2, must be midway between the zeros , that is,
when the x = 7
so (7,2) is the vertex, let's sub that into our equation
2 = a((75)(79)
2 = a(4)
a = 1/2
equation: y = (1/2)(x5)(x9)