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

Transcript

Example 9 Multiply (i) (๐‘Ž+7) and (๐‘โˆ’5) (๐‘Ž+7)ร—(๐‘โˆ’5) = ๐‘Ž(๐‘โˆ’5)+7(๐‘โˆ’5) = (๐‘Žร—๐‘)โˆ’(๐‘Žร—5)+(7ร—๐‘)โˆ’(7ร—5) = ๐’‚๐’ƒโˆ’๐Ÿ“๐’‚+๐Ÿ•๐’ƒโˆ’๐Ÿ‘๐Ÿ“ Example 9 Multiply (ii) (๐‘Ž^2+2๐‘^2 ) and (5๐‘Žโˆ’3๐‘) (๐‘Ž^2+2๐‘^2 )ร—(5๐‘Žโˆ’3๐‘) = ๐‘Ž^2 (5๐‘Žโˆ’3๐‘)+2๐‘^2 (5๐‘Žโˆ’3๐‘) = (๐‘Ž^2ร—5๐‘Ž)โˆ’(๐‘Ž^2ร—3๐‘)+(2๐‘^2ร—5๐‘Ž)โˆ’(2๐‘^2ร—3๐‘) = ๐Ÿ“๐’‚^๐Ÿ‘โˆ’๐Ÿ‘๐’‚^๐Ÿ ๐’ƒ+๐Ÿ๐ŸŽ๐’ƒ^๐Ÿ ๐’‚โˆ’๐Ÿ”๐’ƒ^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.