Q12 of 109 Page 3

In Fig. 2.17, the graph of a polynomial p(x) is given. Find the zeros of the polynomial.

In figure 2.17, the polynomial has 2 zeroes because the graph cuts x-axis at 2 points i.e. x = – 3 and x = – 1.


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If the product of zeros of the quadratic polynomial f(x) = x2 — 4x + k is 3, find the value of k.

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If the sum of the zeros of the quadratic polynomial f (x) = kx2 — 3x + 5 is 1, write the value of k.

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The graph of a polynomial y = f (x), shown in Fig. 2.18. Find the number of real zeros of f (x).

 14

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.