Question

[9.01] Identify the vertex for the graph of y = −5x2 − 20x + 7.

Answer 1

the x coordiante of the vertex is given by -b/2a

Answer 2

in your case b=-20 and a=-4, simply plug these values into the formula above to get the x coordiante of the vertex

Answer 3

once you obtain that x-coordinate plug it back into the original equation to get the y-coordiante