Factorise:
(i) x(x + 3) + 5(x + 3)
(ii) 5x(x − 4) − 7(x − 4)
(iii) 2m(1 − n) + 3(1 − n)

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Solution

(i) $x (x + 3) + 5 (x + 3) = (x + 3) (x + 5)$

(ii) $5 x (x - 4) - 7 (x - 4) = (x - 4) (5 x - 7)$

(iii) $2 m (1 - n) + 3 (1 - n) = (1 - n) (2 m + 3)$

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