Contact us
Choose a category below so we can get back to you as quickly as possible.
x^2+3x+5=5x+m x^2-2x+5-m=0 有交點 Δ>=0 4-4(5-m)>=0 5-m=4 m的取值範圍:[4,+∞)
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.