Question 3 - MCQs from NCERT Exemplar - Chapter 2 Class 10 Polynomials

Last updated at April 16, 2024 by

If one of the zeroes of the quadratic polynomial (k – 1) x 2

 + k x + 1 is –3, then the value of k is

(a) 4/3       (b) (-4)/3  (c) 2/3    (d) (-2)/3

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Question 3 If one of the zeroes of the quadratic polynomial (k – 1) x2 + kx + 1 is –3, then the value of k is (a) 4/3 (b) (−4)/3 (c) 2/3 (d) (−2)/3 Let p(x) = (k – 1) x2 + kx + 1 Since one zero is −3 Therefore, p(−3) = 0 (k – 1) (−3)2 + k(−3) + 1 = 0 9(k − 1) − 3k + 1 = 0 9k − 9 − 3k + 1 = 0 6k − 8 = 0 6k = 8 k = 8/6 k = 𝟒/𝟑 So, the correct answer is (A) 6k = 8 k = 8/6 k = 𝟒/𝟑 So, the correct answer is (A) 6k = 8 k = 8/6 k = 𝟒/𝟑 So, the correct answer is (A)

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science and Computer Science at Teachoo