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

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

Transcript

Ex 9.5, 8 Using (π‘₯+π‘Ž)(π‘₯+𝑏)=π‘₯^2+(π‘Ž+𝑏)π‘₯+π‘Žπ‘ , find (ii) 5.1 Γ— 5.2 5.1 Γ— 5.2 = (5+0.1)Γ—(5+0.2) (π‘₯+π‘Ž)(π‘₯+𝑏)=π‘₯^2+(π‘Ž+𝑏)π‘₯+π‘Žπ‘ Putting π‘₯ = 5 , π‘Ž = 0.1 & 𝑏 = 0.2 = (5)^2+(0.1+0.2)(5)+(0.1)(0.2) = 25+(0.3)5+(0.1Γ—0.2) = 25+3/10Γ—5+(1/10Γ—2/10) = 25+(15/10)+2/100 = 25+1.5+0.02 = πŸπŸ”.πŸ“πŸ

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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.