Contact us
Choose a category below so we can get back to you as quickly as possible.
由X^2Y^2=4可得XY=正負2在有X-Y=2的(X-Y)^2=4=X^2+Y^2-2XY可得XY=2因為XY=-2時X=0,Y=0要舍去當XY=2時(X+Y)^2=12,x+y=正負2根號3帶入解得x=根號3+1,y=1-根號3或(x=負根號3+1,y=-根號3-1)所以問題2=……化簡
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.