Question

Write the equation of the quadratic function with roots -1 and 1 and a vertex at (0, -3).

Answer 1

the roots of a quadratic occur when (x-a) is a factor and f(x) = 0 ; a is the root
f(x) = (x+1)(x-1)

Answer 2

general form for a quadratic ax^2 + bx + c =0
vertex form a(x-h)^2 + k = 0 a=a. h = -b/2a and k = f(h)

Answer 3

I'm stuck on a simple problem!