Question

factorise a cube minus b cube plus b minus a whole cube

Answer 1

Answer:

a³-b³+(b-a)³

Step-by-step explanation:

(a-b)(a²+b²+ab)+b³-a³-3ab(a-b)

" " +b³-a³-3a²b+3ab²

a³-b³ + b³-a³-3a²b+3ab²

-3a²b+3ab²

multiply with (-)

3a²b-3ab²

3(a²b-ab²)

I aint sure about it