Question 4 (ii) - Algebra Identities and Formulas - Chapter 8 Class 8 Algebraic Expressions and Identities

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Ex 9.5, 4 - Chapter 9 Class 8 Algebraic Expressions and Identities - Part 2

Ex 9.5, 4 - Chapter 9 Class 8 Algebraic Expressions and Identities - Part 3

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Question 4 Simplify. (ii) (2š‘„+5)^2āˆ’(2š‘„āˆ’5)^2 Solving (šŸš’™+šŸ“)^šŸ (š‘Ž+š‘)^2=š‘Ž^2+š‘^2+2š‘Žš‘ Putting š‘Ž = 2š‘„ & š‘ = 5 = (2š‘„)^2+(5)^2+2(2š‘„)(5) = 4š‘„^2+25+20š‘„ Solving (šŸš’™āˆ’šŸ“)^šŸ (š‘Žāˆ’š‘)^2=š‘Ž^2+š‘^2āˆ’2š‘Žš‘ Putting š‘Ž = 2š‘„ & š‘ = 5 = (2š‘„)^2+(5)^2āˆ’2(2š‘„)(5) = 4š‘„^2+25āˆ’20š‘„ = 4š‘„^2+25+20š‘„āˆ’4š‘„^2āˆ’25+20š‘„ = (4š‘„^2āˆ’4š‘„^2 )+(25āˆ’25)+(20š‘„+20š‘„) = 0+0+40š‘„ = šŸ’šŸŽš’™

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