A monic cubic polynomial has −2, 0, and 21 as its zeros.
(i) Construct this monic cubic polynomial in standard form.
(ii) Multiply the polynomial obtained in part (i) by 4 so that the coefficient of x3 becomes 4. Write the new polynomial explicitly.
(iii) Evaluate the polynomial of part (ii) at x=−1 and hence state the remainder when it is divided by (x+1).