(3x+y)(2x-3y)-2y(2x-3y)得多少?
数学题(2x+y):(x+2y)=2:3,x:y得多少
2x-5y/x-y等于3/2,x/y得多少?
已知3分之x+1=4分之y+3=5分之x+y,则x+2y+3分之3x+2y+1得多少?
[(3x+y)(x-y)-(2x+3y)(x-y)]*(x-y)
化简:(x-3y)(x+y)-(x-2y)(x+2y)-(x-y)平方
【x-3y][x+y]-[x-2y][x +2y]-[x-y
有这样一道题:"计算(2*x*x*x-3*x*x*y-2*x*y*y)-(x*x*x-2*x*y*y+y*y*y)+【-
2X/x²-64y² 减去1/X-8y得多少,.解析.
计算(x+y)(x+y)^2(-x-y)^3
数学(x-y)^5*(y-x)^3*(x-y)^2
已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y
已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y)