Question

Please help!!!!!!! i am in need of help

Answer 1

First lets solve the first part.
(a + b) (a - b) = a² - ab + ab - b²
= a² - b² (the - ab and the + ab cancel each other out)

Now lets solve:
(a² - b²) (a + b) = a³ + a²b - ab² - b³

Finally, use this and solve:
(a³ + a²b - ab² - b³) (a - b)
=
`a^(4)` - a³b + a³b - a²b² - a²b²​​ + ab³ - ab³ +
`b^(4)`
=
`a^(4)` - 2a²b² +
`b^(4)`