Ex 14.2, 3 (ii) - Chapter 14 Class 8 Factorisation
Last updated at Dec. 26, 2018 by Teachoo
Transcript
Ex 14.2, 3 (Method 1) Factorise the expressions. (ii) 7ใ๐ ใ^2 + 21๐^2 7ใp ใ^2 = 7 ร ใp ใ^2 = 7 ร p ร p 21๐^2 = 21 ร ๐^2 = 3 ร 7 ร q ร q So, 7 is the only common factor. 7ใ๐ ใ^2 + 21๐^2 = (7 ร p ร p) + (3 ร 7 ร q ร q) Taking 7 Common, = 7 ร ((p ร p) + (3 ร q ร q)) = 7 ร (p^2 + 3q^2) = 7 (๐^๐ + 3๐^๐) Ex 14.2, 3 (Method 2) Factorise the expressions. (ii) 7ใ๐ ใ^2 + 21๐^2 7ใp ใ^2 + 21q^2 = 7ใp ใ^2 + (7 ร 3) ใq ใ^2 Taking 7 Common, = 7 (๐^๐ + 3๐^๐)
Ex 14.2
Ex 14.2, 1 (i)
Ex 14.2, 1 (ii)
Ex 14.2, 1 (iii)
Ex 14.2, 1 (iv)
Ex 14.2, 1 (v)
Ex 14.2, 1 (vi) Important
Ex 14.2, 1 (vii)
Ex 14.2, 1 (viii) Important
Ex 14.2, 2 (i)
Ex 14.2, 2 (ii)
Ex 14.2, 2 (iii)
Ex 14.2, 2 (iv)
Ex 14.2, 2 (v)
Ex 14.2, 2 (vi)
Ex 14.2, 2 (vii)
Ex 14.2, 2 (viii) Important
Ex 14.2, 3 (i)
Ex 14.2, 3 (ii) You are here
Ex 14.2, 3 (iii) Important
Ex 14.2, 3 (iv) Important
Ex 14.2, 3 (v)
Ex 14.2, 3 (vi)
Ex 14.2, 3 (vii) Important
Ex 14.2, 3 (viii) Important
Ex 14.2, 3 (ix)
Ex 14.2, 4 (i)
Ex 14.2, 4 (ii)
Ex 14.2, 4 (iii)
Ex 14.2, 4 (iv) Important
Ex 14.2, 4 (v) Important
Ex 14.2, 5 (i)
Ex 14.2, 5 (ii) Important
Ex 14.2, 5 (iii)
About the Author
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.