Ex 9.5, 3 - Chapter 9 Class 8 Algebraic Expressions and Identities - Part 5

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  1. Chapter 9 Class 8 Algebraic Expressions and Identities
  2. Serial order wise

Transcript

Ex 9.5, 3 Find the following squares by using the identities. (v) (0.4π‘βˆ’0.5π‘ž)^2 (0.4π‘βˆ’0.5π‘ž)^2 (π‘Žβˆ’π‘)^2=π‘Ž^2+𝑏^2βˆ’2π‘Žπ‘ Putting π‘Ž = 0.4𝑝 & 𝑏 = 0.5π‘ž = (0.4𝑝)^2+(0.5π‘ž)^2βˆ’2(0.4𝑝)(0.5π‘ž) = (4/10)^2×𝑝^2+(5/10)^2Γ—π‘ž^2βˆ’(2Γ—4/10Γ—5/10)Γ—(π‘Γ—π‘ž) = 16/100 𝑝^2+ 25/100 π‘ž^2βˆ’4/10 π‘π‘ž = 𝟎.πŸπŸ”π’‘^𝟐+𝟎.πŸπŸ“π’’^πŸβˆ’πŸŽ.πŸ’π’‘π’’

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Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 10 years. He provides courses for Maths and Science at Teachoo.