12) In the polynomial expression, a.xn+anxi + ... + ai + as, the value of n should always be? A) negative integer B) negative number C) positive integer D) positive number 13) It is a short method of dividing polynomial expressions using only the numerical coefficients of the terms. A) Factor Theorem B) Long division C) Remainder Theorem D) Synthetic division 14) If P(-2) - 0, which of the following statements is true about P(x)? A) x + 2 is a factor of P(x) B) 2 is root of Px) - 0 C) P(x) = 0, has two negative roots D) P(O) = -2 15) The following are examples of polynomials except? A) x - 4x + 5 B) 4x + 8x + 10x - 7 C) 3x - 5x + 2x - 1 D) - y​