Contact us
Choose a category below so we can get back to you as quickly as possible.
x^2-x-1=0……………………………①x^3-x^2-3x+2008……………………②①×x =x^3-x^2-x=0…………………③把③代入②,得-2x+2008解①——x1=((根號5)+1)/2 x2=(1-(根號5))/2代入-2x+2008得:2007-…
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.