2x-y=-44x-5y=-23搜狗搜索全部时间

x-y/x-x+y/y-(x+y)(x-y)/y²y/x=2x-y/x-x+y/y-(x+y)(x-y)/y²y/x=2x-y/x-x+y/y-(x+y)(x-y)/y²

已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)已知x-y/x+y=3,求代数式5(x-y)/x+y

2(x-y)=5y,x-y=-52(x-y)=5y,x-y=-52(x-y)=5y,x-y=-52*-5=-10-10＝5yy＝-2-5+-2等于几呢,爱克丝就等于几

x-y/5y=(y-x)^2/()x-y/5y=(y-x)^2/()x-y/5y=(y-x)^2/()x-y/5y=(x-y)(x-y)/(5y(x-y))=(y-x)^2/(5y(x-y))x-y/

x*x+2x+y*y-4y+5=0x=y=x*x+2x+y*y-4y+5=0x=y=x*x+2x+y*y-4y+5=0x=y=x^2+2x+y^2-4y+5=0x^2+2x+1+y^2-4y+4=0(

x+y/2+x-y/6=52(x+y)-3(x-y)=-2x+y/2+x-y/6=52(x+y)-3(x-y)=-2x+y/2+x-y/6=52(x+y)-3(x-y)=-2由式（1）获得3X+3γ-

解方程组(x+y)(x-2y)=-5(x-y)(x+2y)=7解方程组(x+y)(x-2y)=-5(x-y)(x+2y)=7解方程组(x+y)(x-2y)=-5(x-y)(x+2y)=7展开x^2-2

3(x+y)+2(x-y)=364(x+y)-5(x-y)=23(x+y)+2(x-y)=364(x+y)-5(x-y)=23(x+y)+2(x-y)=364(x+y)-5(x-y)=23(x+y)+

4(x-y)-3(x-y)=95(x-y)+2(x-y)=114(x-y)-3(x-y)=95(x-y)+2(x-y)=114(x-y)-3(x-y)=95(x-y)+2(x-y)=11打错了吧,这样

3(x+y)-4(x-y)=11,2(x-y)+5(x+y)=273(x+y)-4(x-y)=11,2(x-y)+5(x+y)=273(x+y)-4(x-y)=11,2(x-y)+5(x+y)=27化

{6(x-y)-7(x+y)=21{2(x-y)-5(x+y)=-1{6(x-y)-7(x+y)=21{2(x-y)-5(x+y)=-1{6(x-y)-7(x+y)=21{2(x-y)-5(x+y)=

6(x-y)-2(x+y)=143(x-y)+(x+y)=56(x-y)-2(x+y)=143(x-y)+(x+y)=56(x-y)-2(x+y)=143(x-y)+(x+y)=5设x-y=mx+y=

求(X+Y)(X-Y)(X²+Y²),X=5Y=2,求(X+Y)(X-Y)(X²+Y²),X=5Y=2,求(X+Y)(X-Y)(X²+Y²)

(x-y)/(x+y)=3求(3x-2y-1)/(x+y-5)(x-y)/(x+y)=3求(3x-2y-1)/(x+y-5)(x-y)/(x+y)=3求(3x-2y-1)/(x+y-5)(x-y)/(

先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y)x=4y=5先化简再求值(x-y)(x-2y)+(x-2y)(x-3y)-2(x-3y)(x-4y)x=4y=5

初二上学期方程题4x+y=55x+4y=63x-2y=12x+3y=13x-2y=77x+5y=32x+3y=172x-y=-4x+5y=62x+y=23x-6y=43x+2y=52x+y=73x-4

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*x+y*y)(x*x+y*y)-4x*x*y*y=0,求代数式(

{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?{(x+y)/2+(x-y)/3=1,(x+y)-5(x-y)=2.求x=?,y=?{(x+y)/2+(x-y)/3

已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?X^2表示平方X^2

（x+y-5)*（x+y-5)+（x-y+3)=0x*x-y*y（x+y-5)*（x+y-5)+（x-y+3)=0x*x-y*y（x+y-5)*（x+y-5)+（x-y+3)=0x*x-y*y这是什么