Question 425396
the general vertex form of a quadratic is ___ y = a(x - h)^2 + k ___ (h,k) is the vertex and the "a" is related to the shape


separating out a perfect square ___ y = x^2 + 2x + 1 - 25 = (x + 1)^2 - 25


so the vertex is (-1,-25)


the x-intercepts (roots) are when y equals zero ___ factoring ___ 0 = (x + 6)(x - 4)


the y intercept is when x equals zero ___ y = (0)^2 + 2(0) - 24


this gives you four points to sketch the parabola
remember that the vertex is the "nose" of the parabola and it is on the axis of symmetry