Factories: (i) 12x + 15 (ii) 14m – 21 (iii) 9n – 12n2

1.	Factories: (i) 12x + 15 (ii) 14m – 21 (iii) 9n – 12n2
Answer» (i) 12x + 15 Taking 3 as common from the whole, we get, 12x + 15 = 3(4x + 5). (ii) 14m – 21, Taking 7 as common from the whole, we get, 14m – 21 = 7(2m – 3) (iii) 9n – 12n², Taking 3n as common from the whole, we get, 9n – 12n² = 3n (3 – 4n).

Answer»

(i) 12x + 15

Taking 3 as common from the whole, we get,

12x + 15 = 3(4x + 5).

(ii) 14m – 21,

Taking 7 as common from the whole, we get,

14m – 21 = 7(2m – 3)

(iii) 9n – 12n²,

Taking 3n as common from the whole, we get,

9n – 12n² = 3n (3 – 4n).

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