Question

(a+b)^3=
(a-b)^3=
plzz answer this​

Answer 1

REFER TO THE ATTACHMENT

Answer 2

$\large\tt\underline{Algebraic\:Identities:}$

• (a + b)³

= (a + b)²(a + b)

= (a² + ab + ab + b²)(a + b)

= (a² + 2ab + b²)(a + b)

= a³ + 2a²b + ab² + a²b + 2ab² + b³

= a³ + 3a²b + 3ab² + b³

= a³ + 3ab(a + b) + b³

_______________________

• (a - b)³

= (a - b)²(a - b)

= (a² - ab - ab + b²)(a - b)

= (a² - 2ab + b²)(a - b)

= a³ - 2a²b + ab² - a²b + 2ab² - b³

= a³ - 3a²b + 3ab² - b³

= a³ + 3ab(b - a) - b³

_______________________

Other identities include :

• (a + b)² = a² + b² + 2ab
• (a - b)² = a² + b² - 2ab
• a² - b² = (a + b)(a - b)