Question

What is the formula for a 3 + b 3 ?

Answer 1

a3+b3=(a+b)(a2−ab+b2), or

a3−b3=(a−b)(a2+ab+b2)   or

a3 + b3= (a+b)3 - 3ab(a+b)

Answer 2

a³+b³=(a+b)(a²-ab+b²)
a³-b³=(a-b)(a²+ab+b²)
a³+b³=(a+b)³-3ab(a+b)
a³-b³=(a-b)³+3ab(a-b)

Hope you find this answer helpful.