2x-3=y xy=209 求y,x
来源:学生作业帮 编辑:搜搜做题作业网作业帮 分类:数学作业 时间:2024/07/04 23:43:52
2x-3=y xy=209 求y,x
![2x-3=y xy=209 求y,x](/uploads/image/z/18398023-7-3.jpg?t=2x-3%3Dy+xy%3D209+%E6%B1%82y%2Cx)
2x-3=y xy=209 ;
(2x-3)x=209;
2x²-3x-209=0;
x=(3±41)/4;
x=11或-19/2;
y=19或-22;
(2x-3)x=209;
2x²-3x-209=0;
x=(3±41)/4;
x=11或-19/2;
y=19或-22;
已知3x*+xy-2y*=0,求(x/y)-(y/x)-(x*+y*)/(xy)的值.*是平方
已知xy=-2,x-y=3,求(x+y)(x-y)-y^2+(x-y)^2-(6x^2y-2xy^2)÷2y
已知3x^2+xy-2y^2=0,求{(x+y)/(x-y)+4xy/(y^2-x^2)}/{(x+3y)*(x-y)}
xy=-2,x+y=3,求代数式(4xy+12y)+[7x-(3xy+4y-x)]
已知xy/x+y =3,求2x-3xy+2y/-x+3xy-y 的值.
已知xy/x+y=3,求2x-3xy+2y/-x+3xy-y的值
已知3/(x-y)=1/xy 求(-x-2xy+y)/ (2x+3xy-2y)
若(y-x)/xy=3,求分式(2x+3xy-2y)/(x-2xy-y)的值
已知x-y/xy=3,求分式2x+3xy-2y/x-2xy-y的值.
若y-x/xy=3,求分式2x+3xy-2y/x-2xy-y
已知xy/x+y=3,求代数式2x-5xy+2y/x-3xy+y
已知3x=xy+3y,求2x+xy-2y/y-x-xy的值