The roots of f2 (x) = ax2 + bx + c where a, b, c E Z are - and- X 1 X 2 (b) Use part (a) to find the value of /4 (i) (ii) (c) Find the values of a, b and c where a is the smallest possible positive value. Write down the equation of f2 (x) using your values of a, b and c. /2