Question

(a-b)³ solve the formulla​

Answer 1

$\sf (a-b)(a-b)²$

$\sf (a-b)(a²-2ab+b²)$

$\sf a[a²-2ab+b²]-b[a²-2ab+b²]$

$\sf a³-2a²b+ab²-a²b+2ab²-b³$

$\sf a³-2a²b-a²b+ab²+2ab²-b³$

$\sf a³-3a²b+3ab²-b³$

$\sf\red{ (a-b)³=a³-3a²b+3ab²-b³ }$

Answer 2

Answer:

(a-b)³= a³-3a²b+3ab²-b³