06-08-2016, 09:19 PM
(a + b)^2 - a^2 = a^2 + 2ab + b^2 - a^2 = b^2 + 2ab
It's not as simple in different powers though.
(a + b)^3 - a^3 = a^3 + 3ba^2 + 3ab^2 + b^3 - a^3 = 3ba^2 + 3ab^2 + b^3
It's not as simple in different powers though.
(a + b)^3 - a^3 = a^3 + 3ba^2 + 3ab^2 + b^3 - a^3 = 3ba^2 + 3ab^2 + b^3