Question3 - Chapter 2 Class 9 Polynomials (Important Question)

Last updated at April 16, 2024 by

Ex 2.3, 3 - Check whether 7 + 3x is a factor of 3x3 + 7x - Ex 2.3

Ex 2.3,3 - Chapter 2 Class 9 Polynomials - Part 2

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Question 3 Check whether 7 + 3x is a factor of 3x3 + 7x. Finding remainder when 3x3 + 7x is divided by 7 + 3x Step 1: Put Divisor = 0 7 + 3x = 0 3x = 7 x = ( 7)/3 Step 2: Let p(x) = 3x3 + 7x Putting x = ( 7)/3 p(( 7)/3) = 3(( 7)/3)^3 + 7(( 7)/3) = 3 (7^3/3^3 ) 49/3 = 243/9 49/3 = ( 243 49(3))/9 = ( 243 147)/9 = ( 490)/9 Thus, remainder = p(( 7)/3) = ( 490)/9 Since, remainder is not 0 Thus, 7 + 3x is a not factor of 3x3 + 7x

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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