若(x-y+7)²+|x+2y|=0,则x=_,y=_.
若(x-y+7)²+|x+2y|=0,则x=_,y=_.
已知x-y=1,y≠0,求{(x+2y)²+(2x+y)(x+4y)-3(x+y)(x-y)}÷y的值.
(2/3x-2/x+y(x+y/3x-x-y))÷x-y/x,其中5x+3y=0
x²+y²-4x+6y+13=0,求(3x+y)²-3(3x+y)(x+y)-(x-3y)
若x+2y=-5,x-4y=15,则x-2y=
若整数 x,y 满足x²+4x+y²-6y+13=0,求x , y的值.
已知实数x、y满足 y²-x<=0,x+y<=2,则2x+y的最小值、最大值分别为?
若x²+y²﹣4x﹣10y+29=0求分式x/10y-y/10x的值
x(x-y)-y(y-x)+(x-y)²因式分解
若4x+3y+5=0,则3(8y-x)-5(x+6y-2)的值是多少?
已知x和y满足x+3y+|3x-y|=19,2x+y=6,求x,y的值
1、已知实数x、x满足x²+y²-xy+2x-y+1=0,试求x、y的值.