P(x) = x3 - x2 + 2Calculation:A rational zero THEOREM tells that if p/q is a zero then p = factor of leading term and q = factor of constant.⇒ p/q for p(x) = +_1 and +_1/2So, dividing p(x) with (x + 1) gives p(x) = 0, then (-1) is the only REAL zero FUNCTION of given polynomial.∴ For given polynomial, there is only one real zero. - A root or a zero of a polynomial are the value(s) of X that CAUSE the polynomial to = 0.