已知(2x-y)(2x+y)=-5/2(2y²-64/5),2x(y-1)+4(1/2x-1)=0.求下列各式的值 (1)(x-y)²(2)x四次方+y四次方-2x²y²
来源:学生作业帮助网 编辑:作业帮 时间:2024/10/06 16:45:59
xRNPCSk( -M40D7F RXPAPcmq/8 nL3gΝN'eFcfe>&x.l"mf1̉ ODuRdn3> x^9<<()l.0PZm38ZtRCg6
Ul;VZ:9)*HÃ,R8}v吖rP6M(S}& F}bAMS`3
$gTk$.AQE.r|@/^ )~AU\a6wE
x[f&setVm>"VxvMNGǐ ?Q2 0m53tw%/lM
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知x*x+4x+y*y-2y+5=0,则x*x+y*y=?
已知x-y=3,求[(x+y)(x-y)-(x-y)^2+2y(x-y)]除以的值
已知3x =2y 求x/x+y+y/x-y-y²/x²-y²
x-y/x-x+y/y-(x+y)(x-y)/y² y/x=2
已知f(x+y,y/x)=x^2-y^2,则f(x,y)=
已知x≠y,x^2-x=y^2-y,求x+y的值.
已知x>0,Y>0,如何证x^2/y+y^2/x>=x+y
已知|x|=2,|y|=3,|x+y|=-(x+y)求x-y
已知X.x+y.y-4x+2y+5=0,求4X.X-12X Y+9Y.y的值
已知x+y=a,2x-y=-2a,求[(x/y-y/x)/(x+y)-x(1/x-1/y)]/[(x+1)/y]的值
已知x^2+y^2-4x+2y+5=0则x^y=?
已知x^2+4x+y^2+2y+5=0,则x^y=
已知x+2y=5 2x+y=6 则x-y=
已知x-y=2则代数式(x-y)^2-5x+5y的值
已知x/2=y/5,求x+y/2x-5y的值
已知|x-2y|+|5x-7y-2|则,x = y=
已知x+y=6,x-y=5,则x^2-y^2等于多少