x^2-(3y-1)x+9y-10^2-2因式分解

x²/xy-x/y 3x/4x+y - x-2y/4x+y (1-y/y+x)÷x/y²-x² 9y=3x-(x-1),4(x+y)-(2x+4)=8y [(1/9(x+y)^3-2(x+y)^2-2/3(x+y)]÷x+y/3x+y/3x+y是整体.. 9xy(x-y)(x+1)-3y(x-y)(3x+2y)+6y的平方(x-y)(x+1),因式分解 解下列方程 {x+y=9 （1） {(10y+x)-(10x+y)=9 （2）{(10x+y)-3(x+y)=23 (1){5(x+y)+1=10x+y (2){x+y=9 （1）{(10y+x)-(10x+y)=9 （2） {(10x+y)-3(x+y)=23 (1){5(x+y)+1=10x+y (2) {4x-3y-10=0 3x-2y=0,{3x-4(x-y)=2 2x-3y=1,{2(x+y)-(x-y)=3 (x+y)-2(x-y)=1 若2/x-1/y=3,求[y/x-y/x-y(x-y/x-x+y)]/x-2y/x的值 x(x-y)2-(y-x)3 x+(9-8-y)=10 y+y-(9-8-y)=2 x-y=xx-9.9x xy=11y-1 y=? x=? x+y-xy=?x+(9-8-y)=10y+y-(9-8-y)=2x-y=xx-9.9xxy=11y-1 y=?x=?x+y-xy=? 计算：1.（x-1)^2+2(1-x) 2.(x-y)/(x+3y)÷(x^2-y^2)/(x^2+6xy+9y^2)-2y/(x+y）1.（x-1)^2+2(1-x)2.(x-y)/(x+3y)÷(x^2-y^2)/(x^2+6xy+9y^2)-2y/(x+y） [2X+(Y-10)][2X-(Y-10)]-(3X+Y)(3X-Y) 25(x-y)*2+10(y-x)+125（x-y)^2+10(y-x)+1 3(x+y)-2(x-y)=11 4(x+y)+3(x-y)=9 5x^3y(x-y)^3-10x^4y^3(y-x)^2因式分解 5x^3y(x-y)^3-10x^4y^3(y-x)^2 (3x-y)^2+(3x+y)(3x-y),x=1,y=-2 1 x²y-3xy²2 2x(2x-y)+y(y-2x)3 -6x(m-2n)+12(2n-m)4 3(y-x)²-(x-y)³5 4a²-366 (x-2y)²-x²7 4x³y+4x²y²+xy³8 (x+y)²-2m(x+y)+m²9 x²-9x+1810 -8x²-10x-3 (x+5y)^+(2x+10y)(3x-y)+(3x-y)^