Question

Expand 8a^3
– 729b^3 by using identity.​

Answer 1

. (8a - 9b)³ = (8a)³ - 3(8a)²(9b) + 3(8a)(9b)² - (9b)³                   = 512a³ - 1728a²b + 1944ab² - 729b³

Answer 2

Answer:

(8a^3-9b^3)=(8a-9b)(8a^2+(8a)(9b)+9b^2)

=(8a-9b)(64a^2+72ab+81b^2)

Friends pls try this in ur own also..

Don't copy it..