Ex 14.4, 9 - Find and correct the errors(3x + 2)^2 = 3x^2 + 6x + 4

Advertisement

  1. Chapter 14 Class 8 Factorisation
  2. Concept wise

Transcript

Ex 14.4, 9 Find and correct the errors in the following mathematical statements. ใ€–"(3x + 2)" ใ€—^2= 3๐‘ฅ^2 + 6x + 4 ใ€–"(3x + 2)" ใ€—^2= 3๐‘ฅ^2 + 6x + 4 Solving L.H.S : ใ€–"(3x + 2)" ใ€—^2 Using ใ€–(๐‘Ž โˆ’๐‘)ใ€—^2=๐‘Ž^2+๐‘^2โˆ’2๐‘Ž๐‘ Here a = 3x and b = 2 = ใ€–(3๐‘ฅ)ใ€—^2 + ใ€–(2)ใ€—^2 + 2 (3x) (2) = (3^2 ร— ๐‘ฅ^2) + 2 ร— 2 + (2 ร— 3 ร— 2) x = ใ€–9๐‘ฅใ€—^2 + 4 + 12x โˆด ใ€–"(3x + 2)" ใ€—^๐Ÿ= ใ€–๐Ÿ—๐’™ใ€—^๐Ÿ + 4 + 12x is the correct statement.

About the Author

Davneet Singh's photo - Teacher, Engineer, Marketer
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.