Question

(v) (2a – 7b)3 expand​

Answer 1

Answer:

(2a – 7b)^3 = (2a)^3 - (7b)^3 - 3(2a)(7b)(2a - 7b)

(2a – 7b)^3 = 8a^3 - 343b^3 - 42ab(2a - 7b)

(2a – 7b)^3 = 8a^3 - 343b^3 - 84a^2b + 294ab^2

Used Formula

(a - b)^3 = a^3 - b^3 -3ab(a - b) OR   a^3 - b^3 - 3a^2b + 3ab^2

Answer 2

Answer:

The answer is in the above attachment.

Step-by-step explanation:

The explanation is in the above attachment.