[(x+2y)*-(x+y)(3y-y)-5y*]除以2x 得多少?

2x-5y/x-y等于3/2,x/y得多少? 数学题（2x+y)：（x+2y)=2：3,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? 【(x-y)^2+(x+y)(x-y)】除以 2x 化简[(3x+4y)^2-(2x+y)(2x-y)+(-x+y)(5x-y)]除以-2y,其中x=-1,y=1 {(z+y)(x-y)-(x-y)的2次方+2y(x-y)}除以4y [(x+2y)的平方-(x+y)(x-y)-5y的平方]除以(2x) 2X/x²-64y² 减去1/X-8y得多少,.解析. [(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除以4x [(5x+2y)(3x+2y)+(x+2y)(x-2y)]除以4x 若x,y为实数,且x+2的绝对值=负的根号y-2,则x除以y的2012次方得多少 数学(x-y)^5*(y-x)^3*(x-y)^2