Question 7 (i) - Algebra Identities - Identity III - Chapter 8 Class 8 Algebraic Expressions and Identities

Last updated at August 13, 2026 by

Ex 9.5, 7 - Using a^2 - b^2 = (a + b) (a - b), find (i) 51^2 - 49^2

 

 

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Question 7 Using ๐‘Ž^2โˆ’๐‘^2=(๐‘Ž+๐‘)(๐‘Žโˆ’๐‘) , find (i) ใ€–51ใ€—^2โˆ’ใ€–49ใ€—^2 ใ€–51ใ€—^2โˆ’ใ€–49ใ€—^2 ๐‘Ž^2โˆ’๐‘^2=(๐‘Ž+๐‘)(๐‘Žโˆ’๐‘) Putting ๐‘Ž = 51 & ๐‘ = 49 = (51+49)ร—(51โˆ’49) = 100ร—2 = ๐Ÿ๐ŸŽ๐ŸŽ

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