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Factorise the following expressions 7 a^2 + 14 a

Q2. Factorise the following expressions 

(iii)7 a ^2 + 14 a

Answers (1)
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We have,
           7a^2 = 7 \times a \times a
            14a = 2 \times 7 \times a
\therefore  7a^2+14a = (7\times a \times a)+(2 \times 7 \times a) = (7 \times a)(a+2)
                                                                                        = 7a(a+2)

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