if f(x) = -2x + 4x, complete the square and determine the minimum or maximum value of the function.
f(x) = -2(x - 1)4 + 2 and f(x) has a maximum value f(1) = 2.
f(x) = -2(x - 1)2 + 2 and f(x) has a minimum value f(1) = 2.
f(x) = -2(x - 1)2 - 1 and f(x) has a maximum value f(1) = -1.
d)
f(x) = -2(x - 1)2 - 1 and f(x) has a minimum value f(1) = -1.