Factorize (i) ` 5a^2-20ab` (ii) ` 36a^3b-60a^2bc` (iii) `5a(b+c)-7b(b+c)` (iv)` 6(2a+3b)^2-8(2a+3b)`

Factorize (i) ` 5a^2-20ab` (ii) ` 36a^3b-60a^2bc` (iii) `5a(b+c)-7b(b+

1.	Factorize (i) ` 5a^2-20ab` (ii) ` 36a^3b-60a^2bc` (iii) `5a(b+c)-7b(b+c)` (iv)` 6(2a+3b)^2-8(2a+3b)`
Answer» (i) ` 5a^2--20ab =5a(a-4b)` (ii) ` 36a^3b-60a^2bc=12a^2b(3a-5c)`. (iii) ` 5a (b+c) -7b(b+c)=(b+c) (5a-7b)`. (iv) ` 6(2a+3b)^2-8(2a+3b)=2(2a+3b)[3(2a+3b)-4]=2(2a+3b)(6a+9b-4)`.