Question

25a^2-4b^2+28bc-49c^2

Answer 1

25a² - (4b²-28bc+49c²),

(5a)² - [(2b)²-2×2b×7c+(7c)²],

(5a)²-(2b-7c)²,

[5a+(2b-7c)]×[5a-(2b-7c)],

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

Answer 2

Answer:

Step-by-step explanation:

Hope it will help........