若(x-y)(X+y)=5,(x+y)平方=4,试求x-y的值
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若(x-y)(X+y)=5,(x+y)平方=4,试求x-y的值
若(x-y)(X+y)=5,(x+y)平方=4,试求x-y的值
若(x-y)(X+y)=5,(x+y)平方=4,试求x-y的值
若(X×X+Y×Y)(X×X+Y×Y-5)=36,则X×X+Y×Y=
若3x-5y=0,则x+y/x=(),x-y/y=(),2x-3y/2x+3y=( )
若x-y分之x+y=3,求式子x+y分之5(x-y)—2(x-y)分之x+y的值
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
(x+y-5)*(x+y-5)+(x-y+3)=0 x*x-y*y
已知:3x-5y=0,求x/y,x-y/y,x-y/x
(5)若x/2=y/3(y不为0)则x/y=____,x+y/y=___,y/x-y=___.
若(x*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(x*x+5xy+y*y)/(x*x+2xy+y*y)的值
若|x|=3,|y|=5,且|x+y|=-(x+y),求y-x的值.
若|x|=3,|y|=5,且|x+y|=-(x+y),求y-x的值
若(x-y)(X+y)=5,(x+y)平方=4,试求x-y的值
化简 x / y(x+y) - y / x(x+y) =
若(5x+y)/(7x+10y)=1/2则x/y=
x+y=5; x^y+y^x=17
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
x(x+y)(x-y)-y(y+x)(y-x)=(x-y)( )填空
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
若3x=5y,则x:y=________,(x-y):y=______