已知x-3y=2x+y-15=1,则x^2-4xy+y^2明天确认答案谁对
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/08 20:37:31
xPN0=BٱJ(}JHqA?Nrpl0/!{v;3ڬ]u>$VdHtTvRʓ\UY=Tׇ_<ډo~< bHA*0V1qp2`V- Y[lno)3)F}1.qyYILzf$Hwʿ·r~Ctr^ 5OL>Kf[Ԧ.K'K^dž`h~GHV="%]wzWx3
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)
已知2x=3y,则y分之x=< >,y分之x+y=< >.
已知:2x+y=6,x-3y=1 求7y(x-3y)(x-3y)-2(3y-x)(3y-x)
已知x-y=1,求[(x+2y)^2+(2x+y)(x-4y)-3(x+y)(x-y)]除以y的值大神们帮帮忙
已知x-y=1,求[(x+2y)²+(2x+y)(x-4y)-3(x+y)(x-y)]÷y的值
比例线段:已知x/y=2/3,则 x/x+y= ,x-y/x+y= 要过程!
已知|x+y-3|+(x-y)2=0则
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
1 已知1/X+1/Y=1/X+Y 则 Y/X+X/Y=2 已知1/X-1/Y=5,则3X+5XY-3Y/X-3XY-Y=
已知f(x+y,y/x)=x^2-y^2,则f(x,y)=
已知|x|=2,|y|=3,|x+y|=-(x+y)求x-y
已知x/5=y/3,则(x/x+y)+(y/x-y)-(yxy/xxx-yxy)
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1/x-1/y=3,则代数式x(2-7y)-y(7x+2)/x(1-y)-y(x+1)的值为多少.
已知x+y+2(-x-y+1)=3(1-y-x)-4(y+x-1),则x+y等于多少
已知:3x-5y=0,求x/y,x-y/y,x-y/x
已知x=2+根号3,y=2-根号3,计算代数式(x+y/x-y-x-y/x+y)乘以(1/x^2-1/y^2)