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  1. Chapter 9 Class 8 Algebraic Expressions and Identities
  2. Concept wise

Transcript

Ex 9.4, 2 Find the product. (ii) (๐‘ฅ+7๐‘ฆ) (7๐‘ฅโˆ’๐‘ฆ) (๐‘ฅ+7๐‘ฆ) (7๐‘ฅโˆ’๐‘ฆ) = ๐‘ฅ(7๐‘ฅโˆ’๐‘ฆ)+7๐‘ฆ(7๐‘ฅโˆ’๐‘ฆ) = (๐‘ฅร—7๐‘ฅ)โˆ’(๐‘ฅร—๐‘ฆ)+(7๐‘ฆร—7๐‘ฅ)โˆ’(7๐‘ฆร—๐‘ฆ) = 7๐‘ฅ^2โˆ’๐‘ฅ๐‘ฆ+49๐‘ฆ๐‘ฅโˆ’7๐‘ฆ^2 = ๐Ÿ•๐’™^๐Ÿ+๐Ÿ’๐Ÿ–๐’™๐’šโˆ’๐Ÿ•๐’š^๐Ÿ

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.