A quadratic function is defined by the equation:
$$f(x) = 2x^2 - 4x - 6$$
To find the x-intercepts of the parabola represented by this function, perform the following:
(1) Set the function equal to zero, i.e., $$f(x) = 0$$.
(2) Solve for $$x$$ using the quadratic formula:
$$x =\frac{-b ext{±} ext{√}(b^2 - 4ac)}{2a}$$
where $$a = 2$$, $$b = -4$$, and $$c = -6$$.
Calculate the x-intercepts and provide your answers as a grid-in, listing both x-intercepts in order from least to greatest.