48X=Y 48(2X)=1.25Y

48X=Y 48(2X)=1.25Y x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2 1.(x-2y)(x+2y)-(x平方+y)(x平方-y) 2.(2x-y)(y+2x)-(2y+x)(2y-x)3.已知：x+y=6,x平方-y平方=48,求x,y的值4.x平方-2x分之x+2 -- x平方-4x+4分之x-1 (x+y)^2-8(x+y)+48= (x+y)^2-8(x+y)+48= X*2-Y*2=48,X+Y=6,则x=?,y=? x^2-y^2=48,x+y=4,则x=?y=? 若X^2-y^2=48,x+y=4,则x=?,y=? x+y=8,x^2 - y^2=48 ,则y-x=() 若x^2-y^2=48,x+y=16,求x^2+y^2 填空：x-y/x+y=( )/x^2-y^2 （x-y)2•(y-x)³(x-y)=? y+y'-2y=2x 微分方程y - 2y' + y = x (x+y)(x-y)+(x-y)平方-(x-y)(3x-y) 其中x=-2 y=3分之一 (x-y) (x-2y)+(x+2y) (x-3y)-2(x-3y) (x-4y)= 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 化简 x / y(x+y) - y / x(x+y) =