若|x-y 2|与x y−1互为相反数,则x=_____,y=_____.

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|x-y+1|与(xy+1)^2互为相反数

因为绝对值和平方是非负数大于等于0而两个非负数互为相反数说明这两个都为0.所以x-y+1=0xy+1=0x-y=-1xy=-1那么原式=-1^2除以0除以1+1不能除以0所以(x-y)^2/2xy-2

若根号3x-2y-1与根号2x+y-3互为相反数求(xy)2010

根据题意可知:√(3x-2y-1)≥0,√(2x+y-3)≥0,已知√(3x-2y-1)与√(2x+y-3)互为相反数,两个非负数互为相反数,这只有一种可能:这两个非负数都为0,实数中只有0的相反数还

若1+x与1+y互为倒数,且xy不等于0,求x分之一减y分之一等于?

(1+x)*(1+y)=11+xy+x+y=1xy+x+y=0xy=-(x+y)-------------A式由于1/x-1/y=(y-x)/(xy)试问题目是否出错,是否应改为1/x+1/y的结果:

若1+x与1-y互为倒数,且xy不等于0,则1/x-1/y=

(1+x)(1-y)=11-y+x-xy=1x-y-xy=0,两边同时除以xy,1/y-1/x-1=01/x-1/y=-1

若根号下5-x-y与3x-2y+1的绝对值互为相反数,则根号下xy

因为绝对值和根号下的数都是非负数,所以根据题意得到:5-x-y=03x-2y+1=0解方程得到:x=9/5y=16/5根号下xy=12/5

已知│x-y+1│与x2+8x+16互为相反数,求x2+2xy+y2的值.

已知│x-y+1│与x2+8x+16互为相反数,求x2+2xy+y2的值.x-y+1=0;(1)(x+4)=0;x=-4;y=-4+1=-3;∴x2+2xy+y2=(x+y)²=(-4-3)

已知|x-y+1|与x2+8x+16互为相反数,求x2+2xy+y2的值.

∵|x-y+1|与x2+8x+16互为相反数,∴|x-y+1|与(x+4)2互为相反数,即|x-y+1|+(x+4)2=0,∴x-y+1=0,x+4=0,解得x=-4,y=-3.当x=-4,y=-3时

若x<y<0,则x2−2xy+y2+x2+2xy+y2=(  )

∵x<y<0,∴x-y<0,x+y<0.∴x2−2xy+y2=(x−y)2=|x-y|=y-x.x2+2xy+y2=(x+y)2=|x+y|=-x-y.∴x2−2xy+y2+x2+2xy+y2=-2x

若|3-x|与|x+y|互为相反数,求(x-y)/xy的值.

∵|3-x|与|x+y|互为相反数∴|3-x|+|x+y|=0∵|3-x|≥0,|x+y|≥0∴3-x=0x+y=0解得:x=3,y=-3∴(x-y)/xy=【3-(-3)】/3x(-3)=-2/3

若x-y+2的绝对值与x+y-1的绝对值互为相反数,则xy的负倒数是

∵|x-y+2|与|x+y-1|为相反数∴x-y+2=x+y-1=0∴x=-1/2y=3/2∴xy=-3/4∴xy负倒数为4/3

若1+x与1+y互为倒数,且xy不等于0,求x分之一加y分之一等于?

-1.1+x与1+y互为倒数,则(1+x)(1+y)=11+x+y+xy=1x+y+xy=0x+y/xy=-11/x+1/y=(x+y)/xy=-1

若1+x与1+y互为倒数,且xy不等于0,则1/x+1/y=

1+x=1/(1+y);1+x+y+xy=1;x+y+xy=0;x+y=-xy;1/x+1/y=(x+y)/(xy)=-1;

若a与b互为相反数,x与y互为倒数,求xy-a-b的值?

AB互为相反数,那么A+B=0XY互为倒数,那么XY+1XY-A-B=XY-(A+B)=1-0=1

已知|x+y-1|与|x+2|互为相反数,且a、b互为倒数,求xy+ab的值

|x+y-1|+|x+2|=0x+y-1=0,x+2=0x=-2,y=3ab=1所以xy+ab=-6+1=-5

已知:x2-4x+4与|y-1|互为相反数,则式子(xy−yx)÷(x+y)

∵x2-4x+4与|y-1|互为相反数,∴x2-4x+4+|y-1|=0.∴(x-2)2+|y-1|=0.∴(x-2)2=0,|y-1|=0.∴x=2,y=1.∴(xy−yx)÷(x+y)=(2-12

1已知│x-y+1│与x2+8x+16互为相反数,求x2+2xy+y2的值

(1)|x-y+1|≥0,x^2+8x+16=(x+4)^2≥0两者互为相反数,所以|x-y+1|=x^2+8x+16=0x-y+1=0,x+4=0,所以x=-4,y=-3x2+2xy+y2=(x+y

若(x-3)的平方与/y+1/互为相反数,则xy=

(x-3)+/y+1/=0有题可知x-3=0,/y+1/=0则x=0+3=3,y=0-1=-1所以xy=3*(-1)=-3