Using the quadratic formula what is 5x^2 - 11x - 12

Quadrilateral abcd in the figure below represents a scaled-down model of a walkway around a historic site. quadrilateral efgh represents the actual walkway. abcd is similar to efgh. what is the total length, in feet of the actual walkway?

Graph the equationy=x^2 -[tex]y = x^{2} - 2[/tex]

Heather is riding a quadratic function that represents a parabola that touches but does not cross the x-axis at x=-6