# Ex 14.4, 10 - Chapter 14 Class 8 Factorisation

Last updated at Dec. 26, 2018 by Teachoo

Last updated at Dec. 26, 2018 by Teachoo

Transcript

Ex 14.4, 10 Find and correct the errors in the following mathematical statements. Substituting x = โ 3 in (a) ๐ฅ^2 + 5x + 4 gives ใ"(โ 3)" ใ^2+ 5 (โ 3) + 4 = 9 + 2 + 4 = 15 ๐ฅ^2 + 5x + 4 Putting x = โ3 = ใ(โ3)ใ^2 + 5 (โ3) + 4 = (โ3 ร โ3) โ (5 ร 3) + 4 = 9 โ 15 + 4 = โ 2 So, (โ3)2 + 5(โ3) + 4 = โ2 is the correct statement Ex 14.4, 10 Find and correct the errors in the following mathematical statements. Substituting x = โ 3 in (b) ๐ฅ^2 โ 5x + 4 gives ใ"(โ 3)" ใ^2โ 5 ( โ 3) + 4 = 9 โ 15 + 4 = โ 2 ๐ฅ^2 + 5x + 4 Putting x = โ3 = ใ(โ3)ใ^2 โ 5 (โ3) + 4 = (โ3 ร โ3) + (5 ร 3) + 4 = 9 + 15 + 4 = 28 So, (โ3)2 โ 5(โ3) + 4 = 28 is the correct statement Ex 14.4, 10 Find and correct the errors in the following mathematical statements. Substituting x = โ 3 in (c) ๐ฅ^2+ 5x gives ใ"(โ 3)" ใ^2+ 5 (โ3) = โ 9 โ 15 = โ 24 ๐ฅ^2 + 5x Putting x = โ3 = ใ(โ3)ใ^2 + 5 (โ3) = (โ3 ร โ3) โ (5 ร 3) = 9 โ 15 = โ6 So, (โ3)2 + 5(โ3) = โ6 is the correct statement

Ex 14.4

Ex 14.4, 1

Ex 14.4, 2 Important

Ex 14.4, 3

Ex 14.4, 4

Ex 14.4, 5 Important

Ex 14.4, 6 Important

Ex 14.4, 7

Ex 14.4, 8

Ex 14.4, 9 Important

Ex 14.4, 10 You are here

Ex 14.4, 11 Important

Ex 14.4, 12

Ex 14.4, 13 Important

Ex 14.4, 14

Ex 14.4, 15 Important

Ex 14.4, 16

Ex 14.4, 17 Important

Ex 14.4, 18

Ex 14.4, 19 Important

Ex 14.4, 20

Ex 14.4, 21 Important

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.