Question:
Factorise:
(i) 12x + 15
(ii) 14m − 21
(iii) 9n − 12n2
Solution:
(i) $12 x+15=3(4 x+5)$
(ii) $14 m-21=7(2 m-3)$
(iii) $9 n-12 n^{2}=3 n(3-4 n)$
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