分解因式:(x2-6x+9)+(y2-8y+16)=0(x-3)^2+(y-4)^2=0所以x=3,y=4原式=4/3-3/4=7/12
(x2-6x+9)+(y2-8y+16)=0 (x-3) 2+(y-4) 2=0 x=3,y=4 y/x-x/y=4/3-3/4=7/12