解方程1.x+√(x-4)=6 2. {x+y=18 {√(x-3)-√(y+2)=3
解方程x+xy+y=2+3√2,x^2+y^2=6
解方程 y=x+4 - 3√2 Y等于X加四减三倍根号三
解方程x+y+(x+y/2)=15 3x+5y+4(x+y/2)=62
求方程x+2y-3x=4,3x-2y+x=6,3x+2y-5x=8的解
X,Y均为有理数,有方程2X+√3Y=-6Y-√3X/2+20.求X,Y的值
解方程1.{3x-4y=3 x+4y=17 2.{3x-y=7 4x+2y=16
1.(x^2y-xy^2)除以(x-y) 2.x^2-5x-+6 3.3x^2-8x+4 解方程1,x^2-4x+3 =
已知实数x,y满足方程x^2+y^2-6x+4y+9=0 1求√x^2+(y+1)^2的最大值2求2x+3y的取值范围
3(x+y)—4(x-y)=4,(x+y/2)+(x-y/6)=1.解方程组
x+y/2+x-y/3=6,4(x+y)-3(x-y)=-20
{(x+y)/2+(x-y)/3=6 4(x+y)-3(x-y)=-20
4(x+y)-3(x-y)=-20,2/x+y+3/x-y=6