Contact us
Choose a category below so we can get back to you as quickly as possible.
設兩根為a,b 根據根與係數的關係有: a+b=2m ab=-2m-4 ∵兩根的平方和等於7 ∴a²;+b²;=7 (a+b)²;-2ab=7 (2m)²;-2(-2m-4)=7 4m²;+4m+8=7 4m²;+4m+1=0 (2m+1)²;=0 m=-1/2 ∴m=-1/2時, 方程兩根的平方和等於7
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.