Question

Х(в кубе)+5Х(в квадрате)-Х-5=0

Answer 1

$x^3+5x^2-x-5=0\\\\x^2(x+5)-(x+5)=0\\\\(x^2-1)(x+5)=0\\\\x^2-1=0\\x+5=0\\\\x^2=1\\x=-5\\\\x=-1\\x=1\\x=-5\\\\OTBET:-5;-1;1.$