In Q. No. 14, write the sign of c.

The graph of the polynomial f(x) = ax² + bx + c is as shown below (Fig. 2.19). Write the signs of 'a' and b² – 4ac.

The graph of the polynomial f(x) = ax² + box + c is as shown in Fig. 2.20. Write the value of b² – 4ac and the number of real zeros of f (x).

In Q. No. 15, write the sign of c.

The graph of a polynomial/ (x) is as shown in Fig. 2.21. Write the number of real zeros of f (x).