Ex 12.2, 2 (viii) - Chapter 12 Class 8 Factorisation

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Ex 12.2, 2 (viii) - Factorise 25^a2 - 4b^2 + 28bc - 49^c2 - Ex 12.2

part 2 - Ex 12.2, 2 (viii) - Ex 12.2 - Serial order wise - Chapter 12 Class 8 Factorisation

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Ex 12.2, 2 Factorise. (viii) 25š‘Ž^2 ā€“ 4š‘^2 + 28bc ā€“ 49š‘^225š‘Ž^2 ā€“ 4š‘^2 + 28bc ā€“ 49š‘^2 = 25š‘Ž^2 āˆ’ (4š‘^2 āˆ’ 28bc +49š‘^2) = 25š‘Ž^2 āˆ’ (4š’ƒ^šŸ + 49š’„^šŸ + 28bc) = 25š‘Ž^2 āˆ’ ((2b)2 + (7c)2 āˆ’ 2 Ɨ 2b Ɨ 7c) = 25š‘Ž^2 āˆ’ "(2b āˆ’ " 怖"7c)" 怗^šŸ = (5a)2 āˆ’ "(2b āˆ’ " 怖"7c)" 怗^šŸ = (5a + (2b āˆ’ 7c)) (5a āˆ’ (2b āˆ’ 7c)) = (5a + 2b āˆ’ 7c) (5a āˆ’ 2b + 7c) Using š’™^šŸ āˆ’ š’š^šŸ = (š‘„ + y) (š‘„ āˆ’ y) Here x = 5a and y = 2b āˆ’ 7c

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