#### Answer

A quadratic function can be expressed in the form of

f(x) = a(x - h)2 + k,

in which h and k represents the coordinate of the vertex of the graph of the quadratic function.

f(x) =-2x^2 -8x - 10

=-2(x^2+4x+4)-2

=-2[x-(-2)]^2-2

Therefore,

The vertex of the parabola is (-2,-2)