|x|=5 |y|=6 xy

x+y=6,xy=8,求5x+xy+5y/x-xy+y的值 诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy) |x|/x+y/|y|+xy/|xy|= |x|=5 |y|=6 xy 已知x-y=3xy,且xy不等于0,则-3x+6xy+3y/(7x-5y)-9xy-(3x-y) 2x^+xy-y^-4x+5y-6=? 4xy-[(x²+5xy-y²)-(3xy-1/2y)]x=3,y=-6 若x-y=5,xy=6,求x^2-xy^2和x^2y+xy^2 解方程组：x+y=5-xy x+y=6/xy 若x+y=5,xy=6,求x^2y+xy^2的值 xy=6,x-y=5,x^2y+xy^2 已知x+y=5,xy=6,求x²y+xy²的值 x-y=5,xy=6,求x的平方y+xy的平方 已知5x*x-xy-6y*y=0,求xy的比值 已知X+Y=6,xy=3求代数式（5XY+4X+7Y)+(6X-3XY)-(4XY-3Y)的值 已知x+y=3,xy=1,求代数式5xy+4x+7y+6x-3xy-4xy+3y的值. x-y=3,xy=5,求代数式（7xy+4x-7y）+(6x-3xy)-(3y+4xy)的值快 x+y=8,xy=-2,求(5xy+4x+7y)+(6x-3xy)-(4xy-3y)的值