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# Factorise the following expressions 7 a^2 + 14 a

Q2. Factorise the following expressions

$(iii)7 a ^2 + 14 a$

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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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