Contact us
Choose a category below so we can get back to you as quickly as possible.
因為A^2+B^2-8A+6B+25=0, 所以(A^2-8A+16)+(B^2+6B+9)=0, 所以(A-4)^2+(B+3)^2=0, 所以A-4=0,B+3=0, 所以A=4,B=-3, 所以(A^2+B^2)/(A^2-4AB+4B^2) =[4^2+(-3)^2]/[4-(-3)]^2 =25/49.
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.