Question

x^3+x^2-8x-12=0 решить

Answer 1

$x^3+x^2-8x-12=0\ x^3+4x^2-3x^2+4x-12x-12\ x(x^2+4x+4)-3(x^2+4x+4)\ (x-3)(x^2+4x+4)=0\ (x-3)(x+2)^2=0\ x=3\ x=-2$