Question

b)
Factorise :25 (a - b)2 – 49 (a - b)2​

Answer 1

Hello buddy

25(a-b)² -49(a-b)²

[5(a-b)]² - [7(a-b)]²

[5a-5b]² - [7a-7b]²

[(5a-5b)+(7a-7b)][(5a-5b)-(7a-7b)]

(5a-5b+7a-7b)(5a-5b-7a+7b)

(12a-12b)(-2a+2b)

12(a-b)[-2(a-b)]

-24(a-b)(a-b)

Hope this helps ✌✌✌