y=x^2+7x-8 this is a parabola that turns upward
The x coordinate of the vertex is = -7/2(1) = -7/2 = -3.5
The y coordinate of the vertex is (-3.5)^2 + 7(-3.5) - 8 = -81/4 = -20.25
Factoring to find the roots, we have... (x -1) (x + 8) = 0 setting each factor to 0 rhe roots are x= 1 and x = -8
Here's the graph..........https://www.desmos.com/calculator/jibcea03br