Simplify (2a + b) 3 + (2a- b) 3

Question

Philoid · Accepted Answer

(2a + b)³+ (2a - b)³= (8a³ + 12a²b + 3ab²+ b³)+(8a³- 12a²b + 3ab² - b³)
= 16a³ + 6ab²

Simplify (2a + b)3 + (2a- b)3