26: Consider the equation of parabola f(x)=−(x+7)2−10 . What is the x− coordinate of the vertex

Answer 1

This equation is written in vertex form : f(x)=a(x-h)² + k, so the vertex is (h,k).

The vertex is (-7, -10) so the x-coordinate is -7.

Another way to solve is by graphing and identifying the vertex from the graph.