初二数学解方程
2个回答
2017-04-20
展开全部
好多年了,试试看。
x = 5- 2y
代入
(5-2y)2 -2(5-2y)*y + y2 -1 = 0
25 - 10y + 4y2 -10y + 4y2 -1 = 0
9y2 -30y + 24 = 0
3y2 - 10y + 8 =0
(3y-4)*(y-2) = 0
1. y = 4/3 x = 7/3
2. y=2 x = 1
x = 5- 2y
代入
(5-2y)2 -2(5-2y)*y + y2 -1 = 0
25 - 10y + 4y2 -10y + 4y2 -1 = 0
9y2 -30y + 24 = 0
3y2 - 10y + 8 =0
(3y-4)*(y-2) = 0
1. y = 4/3 x = 7/3
2. y=2 x = 1
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询