# Ex 2.4, 3 (Optional) - Chapter 2 Class 10 Polynomials

Last updated at May 29, 2018 by Teachoo

Last updated at May 29, 2018 by Teachoo

Transcript

Ex 2.4, 3 If the zeroes of the polynomial x3 3x2 + x + 1 are a b, a, a + b, find a and b. Ex 2.4, 3 If the zeroes of the polynomial x3 3x2 + x + 1 are a b, a, a + b, find a and b. Sum of Product zeroes Sum of Product zeroes = / + + = / (a b)a + a(a + b) + (a + b) (a b) = 1 a2 ba + a2 + ab + a2 b2 = 1 a2 + a2 + a2 b2 = 1 3a2 b2 = 1 Putting a = 1 3(1)2 b2 = 1 3 b2 = 1 3 1 = b2 b2 = 2 b = 2 Thus, a = 1 and b = 2

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Davneet Singh

Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.