A quadratic function fis given. f(x) = 2x - 12x + 23 (a) Express fin standard form. f(x) = (b) Find the vertex and x- and y-intercepts of f. (If an answer does not exist, enter DNE.) (x, y) = vertex x-intercept (x, y) = ( y-intercept (x, y) = ( (c) Sketch a graph of f. y y 14아 40 20 -15 -10 5 -15 -10 -5 10 15 10 15 -2아 -20 -40F -4아 40 20 20 -15 - 10 -5 10 15 -15 - 10 -5 10 15 -20 -20 -40- -40 (d) Find the domain and range of f. (Enter your answers using interval notation.) domain range

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