If p is a nonconstant polynomial, a is a number and p(a) = 0, then.. a) p(x) can be factored into (x-a)q(x), where is a polynomial of degree one less than the degree of p. b) p(x) must be equal to the zero polynomial, i. e. p(x) = 0. c) p(x) must be equal to (x-a)? d) p(x) must be equal to (x-a)(x-b) where b is another number.