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Ex 9.5, 1 - Chapter 9 Class 8 Algebraic Expressions and Identities - Part 3

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Ex 9.5, 1 Use a suitable identity to get each of the following products. (iii) (2π‘Ž – 7) (2π‘Ž – 7) (2π‘Žβˆ’7) (2π‘Žβˆ’7) = (2π‘Žβˆ’7)^2 = (2π‘Ž)^2+(7)^2βˆ’2(2π‘Ž) (7) = (2^2Γ—π‘Ž^2 )+49βˆ’(2Γ—2Γ—7)Γ—π‘Ž = πŸ’π’‚^𝟐+πŸ’πŸ—βˆ’πŸπŸ–π’‚

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