Question

Factorise  25a2 – 4b2 + 28bc – 49c2​

Answer 1

here is your answer hope it's help

Answer 2

Answer:

Step-by-step explanation:

25a2-4b2+28bc-49c2

(5a)2-(4b2-28bc+49c2)

(5a)2-{(2b)2-2(2b) (7c)+(7c)2}

(5a)2-(2b-7c)2

(5a-2b+7c) (5a+2b-7c)