Contact us
Choose a category below so we can get back to you as quickly as possible.
|x1-x2|=根號下[(x1-x2)^2] =根號下[(x1+x2)^2-4x1x2] 由韋達定理得x1+x2=-5/2 x1x2=-3/2 所以|x1-x2|=根號下【25/4+6】 =根號下【49/4】 =7/2
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.