video1.0<iframe src="https://www.loom.com/embed/09e80e96daa84ff084498b1370ad0c0f" frameborder="0" width="960" height="720" webkitallowfullscreen mozallowfullscreen allowfullscreen></iframe>720960Loomhttps://www.loom.com720960https://cdn.loom.com/sessions/thumbnails/09e80e96daa84ff084498b1370ad0c0f-00001.jpg116p: y = a(x-2)(x+4) In the quadratic equation above, a is a nonzero constant. The graph of the equation in the xy-plane is a parabola with vertex(c,d). Which of the following is equal to d ? a: -9a ; -8a ; -5a ; -2a ;