CBSE Class 10 Sample Paper for 2022 Boards - Maths Basic [MCQ]

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Question 17 - CBSE Class 10 Sample Paper for 2022 Boards - Maths Basic [MCQ] - Solutions of Sample Papers for Class 10 Boards

Last updated at April 16, 2024 by

If −1 is a zero of the polynomial p(x) = x 2   − 7x − 8 , then the other zero is

(a) −8  (b) −7     (c) 1       (d) 8

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Question 17 If −1 is a zero of the polynomial p(x) = x2 − 7x − 8 , then the other zero is (a) −8 (b) −7 (c) 1 (d) 8 Given p(x) = x2 − 7x − 8 Since −1 is zero of polynomial Let 𝛼 = −1, and 𝛽 be zeros of p(x) Now, Product of Zeros = 𝑐/𝑎 −1 × 𝛽 = (−8)/1 𝛽 = 8 Thus, other zero is 8 So, the correct answer is (d)

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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