已知|x-y-2|+x^+2xy+y的平方=0,求x+2y的值

来源：学生作业帮助网编辑：六六作业网时间：2024/12/19 23:19:48

已知|x-y-2|+x^+2xy+y的平方=0,求x+2y的值已知|x-y-2|+x^+2xy+y的平方=0,求x+2y的值已知|x-y-2|+x^+2xy+y的平方=0,求x+2y的值∴|x-y-2

已知|x-y-2|+x^+2xy+y的平方=0,求x+2y的值
已知|x-y-2|+x^+2xy+y的平方=0,求x+2y的值

已知|x-y-2|+x^+2xy+y的平方=0,求x+2y的值
∴|x-y-2|+(x²+2xy+y²)＝0
→|x-y-2|+(x+y)²＝0.
∴x-y-2＝0且x+y＝0,
∴x＝1,y＝-1.
∴x+2y＝1+2·(-1)＝-1.

已知x*x-4xy+4y*y=0 求[2x(x+y)-y(x+y)]/(4x*x-4xy+y*y)的值? 已知x-xy=8,xy-y=-9,求x+y-2xy的值已知x+y=-1,xy=-2,求代数式-5（x+y)+(x-y)+x(xy+y)的值已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理.已知X+Y=3XY,求2X+2Y-XY除以X+Y+2XY的值,要算理. 已知y=3xy+x,求代数式2x+3xy-2y/x-2xy-y的值已知x+y=3xy,求2x+2y-xy/x+y+2xy的值、已知x-y/xy=3,求分式2x+3xy-2y/x-2xy-y的值. 已知x-y=4xy,求2x+3xy-2y/x-2xy-y的值已知x-y=xy,求(2x-xy-2y)/(x-2xy-y)的值已知x-y=4xy,求x-2xy-y分之2x+3xy-2y的值! 已知y=3xy+x,求代数式2x+3xy-2y/x-2xy-y的值已知xy-x-y=11,求(xy-1)^2+(x+y-2)(x+y-2xy)的值. 已知3x=xy+3y,求2x+xy-2y/y-x-xy的值已知xy/x+y=3,求2x-3xy+2y/-x+3xy-y的值已知xy/x+y=3,求2x-3xy+2y/-x+3xy-y的值已知xy/x+y=2,求代数式3x-5xy+3y/-x+2xy-y的值已知x-y=3xy,求分式3x+2xy-3y/x-2xy-y的值已知xy/x+y=3,则代数式2x-7xy+2y/-x+xy-y的值是多少?