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Ex 14.1, 2 (iii) - Factorise 7a^2 + 14a - Chapter 14 Class 8

Ex 14.1, 2 (iii) - Chapter 14 Class 8 Factorisation - Part 2

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Ex 14.1, 2 (Method 1) Factorise the following expressions. (iii) 7𝑎^2 + 14a 7𝑎^2 + 14a 7𝑎^2 = 7 × 𝑎^2 = 7 × a × a 14a = 14 × a = 7 × a × a So, 7 and a are the common factors. 7𝑎^2 + 14a = (7 × a × a) + (2 × 7 × a) = (7 × a) (a + 2) = 7a (a + 2) Ex 14.1, 2 (Method 2) Factorise the following expressions. (iii) 7𝑎^2 + 14a 7𝑎^2 + 14a = 7𝑎^2 + (7 × 2) a = (7a × a) + (7a × 2) Taking 7a common, = 7a (a + 2)

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