Question 5 - MCQs from NCERT Exemplar - Chapter 2 Class 10 Polynomials

Last updated at April 16, 2024 by

If the zeroes of the quadratic polynomial x2 + (a + 1) x + b are 2 and –3, then

(A) a = –7, b = –1                (B) a = 5, b = –1

(C) a = 2, b = – 6                 (D) a = 0, b = – 6

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Question 5 If the zeroes of the quadratic polynomial x2 + (a + 1) x + b are 2 and –3, then (A) a = –7, b = –1 (B) a = 5, b = –1 (C) a = 2, b = – 6 (D) a = 0, b = – 6 Sum of Zeroes = (−𝑩)/𝑨 2 + (−3) = (−(𝑎 + 1))/1 −1 = − (a + 1) 1 = a + 1 a = 0 Product of Zeroes = 𝑪/𝑨 2 × (−3) = 𝑏/1 −6 = b b = −6 Given zeroes are 2, −3 So, the correct answer is (D)

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