Algebra Identities and Formulas

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Chapter 8 Class 8 Algebraic Expressions and Identities
Serial order wise

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


Transcript

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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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 14 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.