Question

计算y=6-x和y=4/x的二元一次方程

Answer 1

y=6-x ①

y=4/x ②

由①②可得

6-x=4/x

x²-6x+4=0

x=3±√5

将x=3±√5代入 ①,得

x=3+√5,y=3-√5

x=3-√5,y=3+√5