K Use the rational zeros theorem to find all the real zeros of the polynomial function. Use the zeros to factor f over the real numbers. f(x) = 2x³-4x²-14x+28 Find the real zeros of f. Select the correct choice below and, if necessary, fill in the answer box to complete your answer. ○ A. x= (Simplify your answer. Type an exact answer, using radicals as needed. Use integers or fractions for any rational numbers in the expression. Use a comma to separate answers as needed.) OB. There are no real zeros. Use the real zeros to factor f over the real numbers. f(x) = ☐ (Simplify your answer. Type your answer in factored form. Type an exact answer, using radicals as needed. Use integers or fractions for any rational numbers in the expression.)