Funktsiyani nolga tenglashtiring va chap tomonni koeffitsient qiling.

\[{x^5} - 4{x^4} - 32{x^3} = {x^3}\left( {{x^2} - 4x - 32} \right) = {x^3}\left( {x - 8} \right)\left( {x + 4} \right) = 0\]

ko'paytuvchilarga ajratishdan so'ng biz ushbu funktsiyaning uchta ildizi ekanligini ko'rishimiz mumkin:

\[x = - 4,\,\,\,\,\,\,x = 0,\,\,\,\,\,\,x = 8\]