Identify the vertex axis of symmetry and x-intercepts then

Question

f(x) =  -(x² + x - 42)

Identify the vertex, axis of symmetry, and x-intercept(s). Then check your results algebraically by writing the quadratic function in standard form.

(If an answer does not exist, enter DNE.)

Vertex (x,f(x)) (________________)

Axis of symetry (x,f(x)) (________________)

x-intercept (smaller x value (x,f(x)) (________________)

x-intercept (larger x value) (x,f(x)) (________________)

standard form f(x) (________________)