Question 15 - Finding Errors - Chapter 12 Class 8 Factorisation

Last updated at July 27, 2026 by

Ex 14.4, 15 - Find and correct the errors (a - 4) (a - 2) = a^2 - 8

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Question 15 Find & correct the errors in the following mathematical statements. (a ā€“ 4) (a ā€“ 2) = š‘Ž^2 ā€“ 8 Solving L.H.S : (a ā€“ 4) (a ā€“ 2) = a (a āˆ’ 2) āˆ’ 4 (a āˆ’ 2) = (a Ɨ a) āˆ’ (a Ɨ 2) āˆ’ (4 Ɨ a) + (āˆ’4 Ɨ āˆ’2) = š‘Ž^2 āˆ’ 2a āˆ’ 4a + 8 Taking a common = š‘Ž^2 + a (āˆ’2 āˆ’ 4) + 8 = š‘Ž^2 + a (āˆ’6) + 8 = š‘Ž^2 āˆ’ 6a + 8 āˆ“ (a āˆ’ 4) (a āˆ’ 2) = š’‚^šŸ āˆ’ 6a + 8 is the correct statement.

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