CBSE Guess > Papers > Question Papers > Class X > 2009 > Mathematics > Mathematics MATHEMATICS Questions number 1 to 10 carry 1 mark each. Q. 1. What is the exponent of 3 in the prime factorization of 864? Ans. Exponent of 3 is 3 Sol. 864 = 2^{5} x3^{3} Q. 2. The graph of the polynomial y = ax^{2} + bx + c is shown in Fig. 1. Write thevalue of b^{2} – 4ac Ans . b^{2} – 4ac = 0 Sol.2. The graph touches the x-axis at one point only Q. 3. Write the values of k for which the quadratic equation x^{2} – kx + 9 = 0 has equal roots. Ans. k = 6 Sol. 3. Here ‘a’= 1, b = – k, c = 9
CBSE 2009 Question Papers Class X |