Question 3 (vi) - Algebra Identities and Formulas - Chapter 8 Class 8 Algebraic Expressions and Identities

Last updated at August 14, 2026 by

Ex 9.5, 3 - Chapter 9 Class 8 Algebraic Expressions and Identities - Part 6

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Question 3 Find the following squares by using the identities. (vi) (2𝑥𝑦+5𝑦)^2 (2𝑥𝑦+5𝑦)^2 (𝑎+𝑏)^2=𝑎^2+𝑏^2+2𝑎𝑏 Putting 𝑎 = 2𝑥𝑦 & 𝑏 = 5𝑦 = (2𝑥𝑦)^2+(5𝑦)^2+2(2𝑥𝑦)(5𝑦) = (2^2×𝑥^2×𝑦^2 )+(5^2×𝑦^2 )+(2×2×5)×𝑥×(𝑦×𝑦) = 𝟒𝒙^𝟐 𝒚^𝟐+𝟐𝟓𝒚^𝟐+𝟐𝟎𝒙𝒚^𝟐

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