1. Chapter 12 Class 8 Factorisation
  2. Serial order wise
  3. Identify and correct errors in the sentences
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Question 13 - Identify and correct errors in the sentences - Chapter 12 Class 8 Factorisation

Last updated at Dec. 16, 2024 by Teachoo

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Question 13 Find and correct the errors in the following mathematical statements. (2a + 3b) (a โ€“ b) = 2๐‘Ž^2 โ€“ 3๐‘^2 (2a + 3b) (a โ€“ b) = 2๐‘Ž^2 โ€“ 3๐‘^2 Solving L.H.S : (2a + 3b) (a โ€“ b) = 2a (a โˆ’ b) + 3b (a โˆ’ b) = (2a ร— a) โˆ’ (2a ร— b) + (3b ร— a) โˆ’ (3b ร— b) = ใ€–2๐‘Žใ€—^2 โˆ’ 2ab + 3ba โˆ’ ใ€–3๐‘ใ€—^2 = ใ€–2๐‘Žใ€—^2 โˆ’ 2ab + 3ab โˆ’ ใ€–3๐‘ใ€—^2 Taking ab common = ใ€–2๐‘Žใ€—^2 + ab (โˆ’2 + 3) โˆ’ ใ€–3๐‘ใ€—^2 (Since 3ba = 3ab) = ใ€–2๐‘Žใ€—^2 + ab โˆ’ ใ€–3๐‘ใ€—^2 โˆด (2a + 3b) (a โˆ’ b) = ใ€–๐Ÿ๐’‚ใ€—^๐Ÿ + ab โˆ’ ใ€–๐Ÿ‘๐’ƒใ€—^๐Ÿ is the correct statement
  1. Chapter 12 Class 8 Factorisation
  2. Serial order wise

    3. Identify and correct errors in the sentences

    Definition →
Definition →
Chapter 12 Class 8 Factorisation
Serial order wise

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Davneet Singh

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 and Computer Science at Teachoo