已知x+y=-7,xy=14,求5(0.5xy+2一)+(6x-(2xy-y-5x))的值
已知x+y=-7,xy=14,求5(0.5xy+2一)+(6x-(2xy-y-5x))的值
已知xy^2=-6,求-xy(x^3y^7-3x^2y^5-y)的值
已知x-y=6,xy=-2,求3(xy+x-2y)-5(y-2x)+2(xy-x)的值.
1.已知x+y=-4,xy=3,求5(2分之1xy+2y)+[6x-(2xy+y-3x)]的值
已知X+Y=6,XY=-4,求(5X-4Y-3XY)-(8X-Y+2XY)的值
已知xy^2=-2,求-xy(x^2y^5-xy^3-y)的值.
已知x-y=4,xy=-2,求代数式(2x+3y-2xy)-(x+4+xy)-(3xy+2y-2x)的值
已知x+4y=-1,xy=5,求(6xy+7y)+【8x-(5xy-y+6x)】的值
化简求值:已知x+4y=-1,xy=5,求(6xy+7y)+【8x-(5xy-y+6x)】的值
已知x+y=1,xy=-2,试求代数式(xy+5x-2y)-(-3xy+2x-5y)的值.
已知x+y=1,xy=-2,试求代数式(xy+5x-2y)-(-3xy+2x-5y)的值
已知:x+y=3,xy=-2,求(3x-4y+2xy)-(2x-5y+5xy)的值.