Factor x4+4x3+6x2+4x+1x^4 + 4x^3 + 6x^2 + 4x + 1x4+4x3+6x2+4x+1.
(x2+2x+1)2(x^2 + 2x + 1)^2(x2+2x+1)2
(x2+x+1)(x2+3x+1)(x^2 + x + 1)(x^2 + 3x + 1)(x2+x+1)(x2+3x+1)
(x+1)4(x + 1)^4(x+1)4
(x+1)2(x2+1)(x + 1)^2(x^2 + 1)(x+1)2(x2+1)