Contact us
Choose a category below so we can get back to you as quickly as possible.
m=x^2+y^2-2xy+2x^2-4x+2+Y^2-2y+1-6=(x-y)^2+2(x-1)^2+(y-1)^2-6>=-6 答案為-6
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.