Find the vertex of this parabola:
y = -x2 - 6x - 10

To find the vertex you need to use the formula
-b
——
2a
So for this problem that would be:

-(-6)
——— = x= -3
2(-1)

Now that you have x, to find y you need to just simply plug the number that you got for x back into the original equation and solve. Like this-

y= -(-3)2-6(-3)-10

y= 6+18-10

y= 4

This means that your vertex is (-3, 4).
I’m not sure if the 2 next to the x is meant to be squared instead of just 2, so let me know if it was meant to be that and I’d be happy to redo it for you!
Hope this helped! If it did I would appreciate it if you considered marking me brainliest!