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

Transcript

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)