Question

What are the vertex and x-intercepts of the graph of y = (x+4) (x-2)? Select one answer for the vertex and one for the x- intercepts

Answer 1

The x-intercepts are when y=0, which occurs at (-4,0) and (2,0).

The vertex is halfway between the x-intercepts, so it is when x = -1. When x = -1, y = -9.

So, the coordinates of the vertex are (-1, -9).