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Find the exact solutions to f(x) = 0 in the complex numbers and confirm that the solutions are not real by showing that the graph of y = f(x) does not cross the x-axis. x2 + 12x + 40=0 The solution(s) is/are x = (Simplify your answer. Type your answer in the form a + bi. Type an exact answer, using radicals as needed. Use a comma to separate answers as needed.)