Q17 of 109 Page 3

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

The y-intercept of the equation is c,


So, the signs of will be negative as c < 0


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15

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).

 16

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

 18

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

 19

If x = 1 is a zero of the polynomial f (x) = x3 – 2x2 + 4x + k, write the value of k.