(1)x^2+2=4√2x (2)y^2-√2/2y+1/8=0
若|x+2y-1|+y²+4y+4=0,求(2x-y)²-2(2x-y)(x+2y)+(x+2y)&
已知:3x=8y.求(1)x+y/y (2)2x+3y/x-2y
若|x+y-1|+(x-y-2)²=0,求代数式(x+2y)(x-2y)-(2x-y)(-y-2x)的值.
数学题化简再求值(1/x-y+1/x+y)÷x^2 y^2/x^2-y^2,其中x=3,y=-√2
分式的加减:[(x/y-y/x)除以(x+y)+x(1/y-1/x)]除以1+x/y,其中x=5,y=2
化简求值:【(x+Y)(X-Y)-(X-Y)的平方+2Y(2-Y)】除4Y,其中X=1 Y=2
已知4x=9y求(1)x+y/y (2)y-x/2x
实数X.Y满足X*X+Y*Y-2X-2Y+1=0,则(Y-4)/(X-2)的取值范围是?
{3(x+y)-4(x-y)=4 {x+y/2 + x-y/6=1
|2x+y+1|+√2y+3x=0则x.y=
9y=3x-(x-1),4(x+y)-(2x+4)=8y
1、x(x-y)(x+y)-x(x+y)^2