5x^2+8xy+5x^2+6x+5=0求X Y

5x^2+8xy+5x^2+6x+5=0求X Y 诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy) 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] 先化简,再求值：-4x+7x-5-3x-6x+2,其中x=-2分之1 4xy-3x-xy先化简,再求值：-4x+7x-5-3x-6x+2,其中x=-2分之14xy-3x-xy+y+x-3xy-2y+2x+x,其中x=-5,y=-1 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 若（x+1)^2+|y-2|=0,求3x^2-[5xy-(x^2y-3xy)+4x^2y-8xy]的值 已知x>0,y>0,x+根号xy-6y=0,求4x+5根号xy-6y分之x+2根号xy x+y=8,xy=-2,求(5xy+4x+7y)+(6x-3xy)-(4xy-3y)的值 已知x>0,y>0,且x+6y=5根号xy,求(2x+根号xy-y)分之(x+根号xy+2y)的值 1.xy-3x=40;x=52.7x-xy=-18;x=-63.3xy-28=16x;x=44.9y+6xy=30;x=-65.y-2xy=15;x=-16.4x+7y+5xy=0;x=1 若x-y=5,xy=6,求x^2-xy^2和x^2y+xy^2 (8xy-3x平方)-5xy-2(3xy-2x平方),其中,x=2,y=-1 已知X-XY-2Y=0求2X+3XY-Y/X-2XY+5Y 若x+y-5xy=0,求(2x-3xy+2y)/(x+2xy+y)的值 已知xy/x+y=2,求代数式8x-5xy+8y/-x+3xy-y的值 2x^+xy-y^-4x+5y-6=? 因式分解x(x+1)(x^2+5x+6)-8 x^ 2+5xy+x+3y+2y^2 已知13X^2-6XY+Y^2-4X+1=0,求(XY-X^2)^5的值.