x²-9/x²+2x-3乘3x²-x-2/x²-5x+6,

x²-2xy+y²-9 x²-y²+6x+9分之x²+y²-9-2xy x²-9/x²+2x-3乘3x²-x-2/x²-5x+6, 1.x²-2x-3 2.x²-5x-6 3.x²-9x-10 4.x²-9x-10 5.x²-2x-8 6.x²+2x-8 7.x²-x-12 8.x²+x-12 9.x²+6x-16 10.x²-14x-32 11.x²+7x-18 （3x-2y)²(3x-2y)²(9x²+4y²）² 化简~(x²+3x+9/x²-27)+(6x/9x-x²)-(x-1/6+2x)(x²+3x+9/x²-27)+(6x/9x-x²)-(x-1/6+2x)注意了!是三个分式!(x²+3x+9)/(x²-27)+(6x)/(9x-x²)-(x-1)/(6+2x) xy²/(x²y-y) × x²/(x²+x)=(x²-3x)/(x²-5x) × 2x-10/(x²-6x+9)=化简求植x²-1/(x²-x-2)除以x/2x-4,其中x=1/2[x-x/(x+1)]除以[x/(2x-4)] ,其中x=√2+1 因式分解（x²－2x）²－9 计算x²-x/x²×x/1-x和x²-4y²/x²+2xy+y²÷x+2y/x²+xy 分解因式：4b²c²-(b²+c²-a²)² 25（x+y)²-16(x-y)² x²-6x+9 计算：x²-6x+9/x²-x-6÷x²-9/x²-3x-10 乘以x+3/2x-10 1(x²-9)/(x²+2x²+x)*(3x³+9x²)/(x³-3x),其中x=-1/3 1.（3x²+2x-8）²-（x²-2x-8）²2.(x+2)(x+3)+x²-43.x²（a-b)+16(b-a)4.（x²+2x）²-7（x²+2x)-85.(x²+9y²）²-36x²y²6.（x-1）（x-2y-1)+y² (x²-y)²-(2y-2)²^4表示4次方9x^4-36y²(a²-2b)²-(1-2b)² 3x² - 9x + 2 = 0 x² - 14x = 8 x² + 6x = 1 关于分式约分题,1.x²-y²/x²+2xy+y²2.x²+4x+3/ x²+x-63.m²+3m/9-m² 初二数学-1/4x²+1/3xy-1/9y² （x²+1/4)²-2x(x²+1/4)+x²急啊!（1）-1/4x²+1/3xy-1/9y²（2）（x²+1/4)²-2x(x²+1/4)+x²10点之前给我!. 1/X²+3X+2 +1/X²+5X+6 +1/X²+7X+12 +1/X²+9X+20