2x^2+xy-y^2-4x+8y-6分解因式

7x^2y-[xy+4(xy^2+1/8xy)-3x^2y]答对给分 因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy) 分简 xy-2y /x^2-4x+4 一道因式分解题 2x²+xy-y²-4x+5y-6 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) 2X^+XY-Y^-4X+5Y-6 2x^+xy-y^-4x+5y-6=? 几道因式分解题4X的四次方+1X的三次方-3X+2(X+Y-2XY)(X+Y-2)+(XY-1)²(X+1)(X+2)(X+3)(x+6)+X²X-2Y=8/20072X+Y=2007/3 不解方程组,求9X²-15XY-6Y²的值 3(x-y)²-7(x-y)+8(x-y)²+6(x-y)求详细过程（2） 5xy-4x²y-8xy²+3xy-xy²+4x²y (x+y)(x+y+2xy)+(xy+1)(xy-1)(x+y)(x-y)+4(y-1) 因式分解 6x(x-y)^2-8y(y-x)^33x-4xy+4y^2 5x^3y*(-3y)^2+(-6xy)^2*(-xy)+xy^3*(-4x^2) 计算:2xy/(x+y)².(x+y)/4y 1-2/x+y=xy,4y+6x=xy.求xy的解? 因式分解：3x^2y+6xy-4x-8 因式分解 3x^2-6xy-4x+8y