Ex 2.3,2 - Find the remainder when x3 - ax2 + 6x - a is - Remainder Theoram

  1. Chapter 2 Class 9 Polynomials
  2. Serial order wise
Ask Download

Transcript

Ex 2.3, 2 Find the remainder when x3 − ax2 + 6x − a is divided by x − a. Dividing x3 − ax2 + 6x − a  by x – a Step 1: Put Divisor = 0 x – a = 0 x = a Step 2: Let p(x) = x3 − ax2 + 6x − a Putting x = a p(a) = (a)3 – a(a)2 + 6(a) – a = a3 – a3 + 6a – a = 5a Thus, Remainder = p(a) = 5a = (−125)/8 + 3(25/4) – 15/2 + 1 = (−125)/8 + 75/4 – 15/2 + 1 = (−125 + 75(2) − 15(4) + 1(8) )/8 = (−125 + 150 − 60 + 8)/8 = (−27)/8 Thus, remainder = p((−5)/2) = (−27)/8

About the Author

Davneet Singh's photo - Teacher, Computer Engineer, Marketer
Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He provides courses for Mathematics from Class 9 to 12. You can ask questions here.
Jail