Question

Factorise the following expression:

7a² + 14a

Answer 1

7a² = 7 × a × a

14a = 2 × 7 × a

The common factors are 7 and a.

∴ 7a² + 14a = (7 × a × a) + (2 × 7 × a)

= 7 × a (a + 2)

= 7a (a + 2)