3x*x+5xy-2y*y+x+9y-4

因式分解 x-xy+3y-3x 2x+xy-y-4x+5y-6 因式分解:12xy^2(y-x)+xy^3(x-y)+4x^2y(x-y) 3x*x+5xy-2y*y+x+9y-4 3x*x+5xy-2y*y+x+9y-4请因式分解 计算(x^8-x^7y+x^5y^3-x^4y^4+x^3y^5-x^y^7+y^8)(x^2+xy+y^2) 化简：3x^2-[5xy-(x^y-3xy)+4x^2y-8xy] x²-y²+5x+3y+4（x+y-2xy)(x+y-z)+(xy-1）² 化简：x-y/x+3y÷x^-y^2/x^2+6xy+9y^2-(xy/x+y) 因式分解 （3x+2y）-（x-y）² x²-xy+3y-3x 2x²+xy-y²-4x+5y-6 x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x² (x-2xy)*(-xy+2y*y)-(3x*x-2xy)(x-9xy+6y*y)答案应为-2x-x*x-3x， 已知x^2+9y^2-2x-6y+2=0,求{-（xy/（x-y）^2}^4*(y^2-xy/x)^3*x^4/y^10/(x/xy-y^2)^5的值 已知x,y>0 2x+y+3=xy 求5x+4y最小值 已知x-y=3xy,求5x+2xy-5y/x-4xy-y的值 诺x+y=6,xy=4 求(5x-4y-3xy)-(8x-y+2xy) 1.24xy^4+2x^3y^2-2x^5 2.4x^4y^2-5x^2y^2-9y^2 3.24x^2y-30xy-75y 4.10(y+2)^2-29(y+2)+101.24xy^4+2x^3y^2-2x^5 2.4x^4y^2-5x^2y^2-9y^2 3.24x^2y-30xy-75y 4.10(y+2)^2-29(y+2)+10 1.24xy^4+2x^3y^2-2x^5 2.4x^4y^2-5x^2y^2-9y^2 3.24x^2y-30xy-75y 4.10(y+2)^2-29(y+2)+101.24xy^4+2x^3y^2-2x^5 2.4x^4y^2-5x^2y^2-9y^2 3.24x^2y-30xy-75y 4.10(y+2)^2-29(y+2)+10 分解因式 x(x-y)^5+xy(y-x)^4-x^3(x-y)3