Points: 0 of 1 . Find all zeros of the polynomial function. Use the Rational Zero Theorem, Descartes's Rule of Signs, and possibly the graph of the polynomial function shown by a graphing utility as an aid in obtaining the first zero or the first root. f (x ) = x4 + 7x2+18x+10 Find the zeros of the polynomial function. (Simplify your answer. Type an exact answer, using radicals and i as needed. Use a comma to separate answers as needed. Type each answer only once.)