Did you know that
a^4 + b^4 = (a^2 + ab
2 + b^2) (a^2 – ab
2 + b^2)













http://en.wikipedia.org/wiki/Factorization
a^4 + 4 b^4 = (a^2 + 2 b^2)^2 – (2ab)^2
Did you know that
a^4 + b^4 = (a^2 + ab
2 + b^2) (a^2 – ab
2 + b^2)













http://en.wikipedia.org/wiki/Factorization
a^4 + 4 b^4 = (a^2 + 2 b^2)^2 – (2ab)^2