Question

Please solve Q-3,4. In the pic.
And mark all my answers as brainest​

Answer 1

Answer:

(a) (a + b )³ + ( a - b )³

[ a³ + b³ + 3ab (a + b)] +[a³ - b³ - 3ab (a - b ) ]

a³ + b³ + 3a²b + 3ab² + a³ - b³ - 3a²b + 3ab²

a³ + 3ab² + a³ + 3ab²

2a³ + 6ab²