解方程组:x^2-2xy-y^2+2x+y+2=0,2x^2-4xy-2y^2+3x+3y+4=0
来源:学生作业帮助网 编辑:作业帮 时间:2024/09/01 13:29:47
![解方程组:x^2-2xy-y^2+2x+y+2=0,2x^2-4xy-2y^2+3x+3y+4=0](/uploads/image/z/1270693-37-3.jpg?t=%E8%A7%A3%E6%96%B9%E7%A8%8B%E7%BB%84%EF%BC%9Ax%5E2-2xy-y%5E2%2B2x%2By%2B2%3D0%2C2x%5E2-4xy-2y%5E2%2B3x%2B3y%2B4%3D0)
xQN0&q>| `Ue+Rj*.h4q7~Gh0u}=8/몙~l? 4`QpXY&{m|>.|Dp
zpC)Ni`KZݾ߮ֆLjoϳhBMQ$Q@t"k":l˶۲yEbߕW7E>wE3z4a4YYәI탁" 'XTk?I<fIH
解方程组:x^2-2xy-y^2+2x+y+2=0,2x^2-4xy-2y^2+3x+3y+4=0
解方程组:x^2-2xy-y^2+2x+y+2=0,2x^2-4xy-2y^2+3x+3y+4=0
解方程组:x^2-2xy-y^2+2x+y+2=0,2x^2-4xy-2y^2+3x+3y+4=0
x^2-2xy-y^2+2x+y+2=0,(1)
2x^2-4xy-2y^2+3x+3y+4=0 ,(2)
(1)式*2得
2x^2-4xy-2y^2+4x+2y+4=0,(3)
(2)式-(3)式得
-x+y=0
x=y
代入(1)
y^2-2y^2-y^2+2y+y+2=0
2y^2-3y-2=0
(y-2)(2y+1)=0
y1=2,y2=-1/2
x1=2,x2=-1/2
解是;
x1=y1=-1/2,x2=y2=2
两组解
我用计算机算的
答案是{{x -> -(1/2), y -> -(1/2)}, {x -> 2, y -> 2}}
x^2-2xy-y^2=-2x-y-2=-(3x+3y+4)/2
4x+2y+4=3x+3y+4
x=y
求方程组的解,方程组xy/(2x+y)-xy/(2x-y)=3,xy/(2x-y)+xy/(2x+y)=4
解方程组:xy/x+y=-6(1) 2xy/x+2y=12(2)
解方程组x+y+xy=7 x^2+y^2+xy=13
解方程组x+y=xy,x+2y=xy²
解方程组 x-y=1 2xy=2
x+y+xy=5 (x^2)y+x(y^2)=6 解方程组
解方程组 xy=1 x-y=3/2
解方程组:x+y=2 ,xy+z=1
解方程组x-y=3&xy=-2
解方程组:(x+y)^2-2xy-(x^2)(y^2),x+y-xy=4解方程组(x+y)^2-2xy-(x^2)(y^2)=10x+y-xy=4
解方程组:x²+2xy+y²=1 2x²-xy=0
解方程组2x*+2xy+4y*+x=19;x*+xy+2y*-y=9
方程组x^3y=35-y,x^2y=30-xy的解为
{x²-2xy-y²=2 {xy+y²=4 解这个方程组
解方程组:x+y=xy=11 (1) x*x*y+x*y*y=30 (2)
解方程组 2x²-xy+y²=2y;2x²+4xy=5y
解方程组{x的平方-2xy+x=10 x-2y=-4
解方程组{x的平方-2xy+x=10 x-2y=-4