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Ex 9.5, 1 - Chapter 9 Class 8 Algebraic Expressions and Identities - Part 10

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Ex 9.5, 1 Use a suitable identity to get each of the following products. (x) (7π‘Žβˆ’9𝑏) (7π‘Žβˆ’9𝑏) (7π‘Žβˆ’9𝑏)^2 = (7π‘Ž)^2+ (9𝑏)^2βˆ’2(7π‘Ž)(9𝑏) = (7^2Γ—π‘Ž^2 )+(9^2×𝑏^2 ) βˆ’(2Γ—7Γ—9)Γ—π‘ŽΓ—π‘ = 49π‘Ž^2+81𝑏^2βˆ’(14Γ—9)π‘Žπ‘ = πŸ’πŸ—π’‚^𝟐+πŸ–πŸπ’ƒ^πŸβˆ’πŸπŸπŸ”π’‚π’ƒ

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 12 years. He provides courses for Maths and Science at Teachoo.