Ex 12.3, 5 (iii) - Chapter 12 Class 8 Factorisation
Last updated at Dec. 16, 2024 by Teachoo
Last updated at Dec. 16, 2024 by Teachoo
Ex 12.3, 5 Factorise the expressions and divide them as directed. (iii) (5๐^2 โ 25p + 20) รท (p โ 1)We first factorise ใ๐๐ใ^๐ โ 25p + 20 Taking 5 common, = 5 (๐^2โ5๐+4) By middle term splitting, = 5 (๐^2โ๐โ๐๐+4) = 5 [(๐^2โ p) โ (4p โ 4)] = 5 [p(p โ 1) โ 4 (p โ 1)] Taking (p โ 1) common, = 5 (p โ 1)(p โ 4) Splitting the middle term We need to find two numbers whose Sum = โ5 Product = 4 So, we write โ5p = โp โ 4p Dividing (ใ5๐ใ^2โ25๐+20)รท(๐+1) = (ใ5๐ใ^2 โ 25๐ + 20)/((๐ โ1)) = (๐ (๐ โ๐) (๐โ๐))/((๐ โ๐)) = 5 ร ((๐ โ 1) )/((๐ โ 1)) ร (p โ 4) = 5 (p โ 4)
Ex 12.3
Ex 12.3, 1 (ii) Important
Ex 12.3, 1 (iii)
Ex 12.3, 1 (iv) Important
Ex 12.3, 1 (v)
Ex 12.3, 2 (i)
Ex 12.3, 2 (ii) Important
Ex 12.3, 2 (iii) Important
Ex 12.3, 2 (iv)
Ex 12.3, 2 (v) Important
Ex 12.3, 3 (i)
Ex 12.3, 3 (ii)
Ex 12.3, 3 (iii) Important
Ex 12.3, 3 (iv)
Ex 12.3, 3 (v) Important
Ex 12.3, 4 (i)
Ex 12.3, 4 (ii) Important
Ex 12.3, 4 (iii)
Ex 12.3, 4 (iv)
Ex 12.3, 4 (v) Important
Ex 12.3, 5 (i)
Ex 12.3, 5 (ii) Important
Ex 12.3, 5 (iii) You are here
Ex 12.3, 5 (iv) Important
Ex 12.3, 5 (v)
Ex 12.3, 5 (vi)
Ex 12.3, 5 (vii) Important
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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