2022-11-29 function f(x)=axn+bxn-1…+z α=0 f(x)=(αx2+βx+γ)(δx2+εx+ζ)…(χx2+ψx+ω) β2−4αγ<0 ε2−4δζ<0 ・ ・ ψ2−4χω<0 T.theodor 2022.11.29.