Question

• factories . (3a-b)2 = 9c²​

Answer 1

Answer:

(3a-b)^2 - 9c^2

=> (3a-b)^2 - (3c)^2

= (3a-b+3c)(3a-b-3c)

Answer 2

Answer:

(3a-b)2 = 9c²

(3a)^2 + (-b)^2 - 2(3a)(b) = 9c^2

9a^2 + b^2 - 6ab = 9c^2

9a^2 + b^2 - 9c^2 - 6ab