Hi Using the vertex form of a parabola, where(h,k) is the vertex y = (x + 3)(x - 4) y = x^2 -x - 12 |expanding y = (x- 1/2)^2 - 1/4 - 12 |completing the square y = (x- 1/2)^2 - 49/4 Vertex is Pt(1/2,-49/4), line of symmetry x = 1/2