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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 has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.