X=1,Y=3写出二元二次方程要过程这是考卷上的题目没有错.没懂啊

Question

X=1,Y=3写出二元二次方程要过程
这是考卷上的题目没有错.
没懂啊

Answer 1

(1.(x^2)/(x+1)(y+3)+(y^2)/(x+1)(y+3)=10/(x+1)(y+3)
(x^2)/(x+1)(y+3)-(y^2)/(x+1)(y+3)=-8/(x+1)(y+3)
(2.(2x^2)/(x+1)(y+3)+(y^2)/(x+1)(y+3)=11/(x+1)(y+3)
(x^2)/(x+1)(y+3)-(2y^2)/(x+1)(y+3)=-17/(x+1)(y+3)
因为(x+1)(y+3)
所以x≠-1,y≠-3
等等,还有很多