Ex 9.1, 3 (iv) - Chapter 9 Class 8 Algebraic Expressions and Identities

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Ex 9.1, 3 Add the following. (iv) 𝑙^2 〖+ 𝑚〗^2, 𝑚^2 〖+ 𝑛〗^2, 𝑛^2 〖+ 𝑙〗^2, 2𝑙𝑚 + 2𝑚𝑛 + 2𝑛𝑙 Expressions are 𝑙^2 〖+ 𝑚〗^2, 𝑚^2 〖+ 𝑛〗^2, 𝑛^2 〖+ 𝑙〗^2, 2𝑙𝑚 + 2𝑚𝑛 + 2𝑛𝑙 We put like terms below like terms ∴ Required sum = 2𝑙^2+2𝑚^2+2𝑛^2+2𝑙𝑚+2𝑚𝑛+2𝑛𝑙 = 𝟐(𝒍^𝟐+𝒎^𝟐+𝒏^𝟐+𝒍𝒎+𝒎𝒏+𝒏𝒍)