Put y= x2 + 4x - 6 in vertex form (y=a(x-h)2 + k) and state the vertex, axis of symmetry, y-intercept-PLZ HELP?

put y= x2 + 4x - 6 in vertex form (y=a(x-h)2 + k) and state the vertex, axis of symmetry, y-intercept-PLZ HELP .... appreciate all forms of help thanks