Теорема Виета x1^4+x2^4
X²+px+q=0 x1+x2=-p U x1*x2=q x1²+x2²=(x1+x2)²-2x1x2 (x1²+x2²)²=((x1+x2)²-2x1x2)² x1^4+x^4=(x1+x2)^4-4x1x2(x1+x2)²+4x1²x2²-2x1²x2² x1^4+x^4=(x1+x2)^4-4x1x2(x1+x2)²+2x1²x2² x1^4+x2^4=(-p)^4-4q(-p)²+2q² x1^4+x2^4=p^4-4p²q+2q²