f(x) = -x^4 + 4x^3 + 2x^2 - 12x x values: -2,-1,0,1,2,3,4

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To sketch the selected graph, one has to solve f(x) for the selected x values. For example, for x=3

f(3)= -(3^4) + 4*(3^3) + 2*(3^2) - 12*3 = -81 + 108 + 18 - 36 = 9

The attached excel file show all values and graph

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