Question

Factorise:- (a+b)^3-a-b

Answer 1

Hello!

$\sf ( a + b )^{3} - a - b$

⇒ $\sf ( a + b )\: [ \:( a + b )^{2} - 1\: ]$

⇒ $\boxed{\sf ( a + b ) ( a^{2} + 2ab + b^{2} - 1 )}$

Cheers!