/ / ___________\\ / / ___________\\ / / ___________\\ / / ___________\\ | | ___ / ___ || | | ___ / ___ || | | ___ / ___ || | | ___ / ___ || | | 1 \/ 5 / 5 \/ 5 || | | 1 \/ 5 / 5 \/ 5 || | | 1 \/ 5 / 5 \/ 5 || | | 1 \/ 5 / 5 \/ 5 || (x - y)*|x - y*|- - + ----- - I* / - + ----- ||*|x - y*|- - + ----- + I* / - + ----- ||*|x - y*|- - - ----- - I* / - - ----- ||*|x - y*|- - - ----- + I* / - - ----- || \ \ 4 4 \/ 8 8 // \ \ 4 4 \/ 8 8 // \ \ 4 4 \/ 8 8 // \ \ 4 4 \/ 8 8 //
((((x - y)*(x - y*(-1/4 + sqrt(5)/4 - i*sqrt(5/8 + sqrt(5)/8))))*(x - y*(-1/4 + sqrt(5)/4 + i*sqrt(5/8 + sqrt(5)/8))))*(x - y*(-1/4 - sqrt(5)/4 - i*sqrt(5/8 - sqrt(5)/8))))*(x - y*(-1/4 - sqrt(5)/4 + i*sqrt(5/8 - sqrt(5)/8)))
/ 4 4 3 3 2 2\ (x - y)*\x + y + x*y + y*x + x *y /
(x - y)*(x^4 + y^4 + x*y^3 + y*x^3 + x^2*y^2)