factor these expressions

Question

A) x^4+x^2+1
B) x^10+x^5+1

Answer 1

A) (x^2 + x + 1) (x^2 - x +1)
B) (x^2 + x + 1) (x^8 - x^7 + x^5 - x^4 + x^3 - x + 1 )

Answer 2

just curious, how did you get the second one??

Answer 3

thanks!