化简求值:已知x-2y=2013,求【(3x+2y)(3x-2y)-(x+2y)(5x-2y)】/4x的值

化简求值:已知x-2y=2013,求【(3x+2y)(3x-2y)-(x+2y)(5x-2y)】/4x的值 先化简再求值(x-y)(x+y)-(x-2y) 的完全平方+x(3x-5y)-(x-y)(x-2y),其中x=1/2 y 已知x-y/x+y=3,求代数式5(x-y)/x+y-x+y/2(x-y) 化简求值：已知x、y满足：x^2+y^2-4x+6y+13=0 求代数式 的值.(3x+y)^2-3(3x-y)(x+y 已知x.y满足2x-y=3m,x+2y=4m+5,且x+y=9,求m的值 整体求值 化简求值{(x=2y)(5x-2y)-(3x+2y)(3x-2y)]/4x,其中x=2,y=-1 初二化简求值题[（5x+2y)(3x+2y)+(x+2y)(x-2y)]/4x,其中x=2,y=3 已知X-Y/X+Y=3,求代数式2(x-y)/X+Y-3X+Y/X+Y 已知2x-y/x+3y=2,求代数式4x-2y/x+3y减4x+12y/2x-y的值 化简求值：已知【3x分之2-x+y分之2（3x分之x+y-x-y）】÷5x+3y=0 1.已知:x-2y=3,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]除4x 的值 已知x-2y=2011,求[(3x+2y)(3x-2y)-(x+2y)(5x-2y)]÷4x的值.