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  1. Chapter 14 Class 8 Factorisation
  2. Serial order wise

Transcript

Ex 14.4, 15 Find & correct the errors in the following mathematical statements. (a โ€“ 4) (a โ€“ 2) = ๐‘Ž^2 โ€“ 8 Solving L.H.S : (a โ€“ 4) (a โ€“ 2) = a (a โˆ’ 2) โˆ’ 4 (a โˆ’ 2) = (a ร— a) โˆ’ (a ร— 2) โˆ’ (4 ร— a) + (โˆ’4 ร— โˆ’2) = ๐‘Ž^2 โˆ’ 2a โˆ’ 4a + 8 Taking a common = ๐‘Ž^2 + a (โˆ’2 โˆ’ 4) + 8 = ๐‘Ž^2 + a (โˆ’6) + 8 = ๐‘Ž^2 โˆ’ 6a + 8 โˆด (a โˆ’ 4) (a โˆ’ 2) = ๐’‚^๐Ÿ โˆ’ 6a + 8 is the correct statement.

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Davneet Singh
Davneet Singh is a graduate from Indian Institute of Technology, Kanpur. He has been teaching from the past 9 years. He provides courses for Maths and Science at Teachoo.