Factories:

i. 16a² – 24ab

ii. 15ab² – 20a²b

iii. 12x²y³ – 21x³y²

(i) Let’s take HCF of 16a² – 24ab

Taking 8a as common from the whole, we get,

16a² – 24ab = 8a(2a – 3b).

(ii) 15ab² – 20a²b,

Taking 5ab as common from the whole, we get,

15ab² – 20a²b = 5ab(3b – 4a)

(iii) 12x²y³ – 21x³y²,

Taking 3x²y² as common from the whole, we get,

12x²y³ – 21x³y² = 3x²y²(4y – 7x)