2x-2/ x²-3x+2-x+2/x²-x-6+3-x/x四次方-4x+3先约分再通分.

4x²-[2x-(x²-2x+3)-2(x²-3x)] 计算 (x²-4分之x²+x+1)²÷(x三次方-3x²+2x÷x三次方)²×(x÷x+2)² , 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 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 (x²+4x+8)²+3x(x²+4x+8)+2x²因式分解 分解因式：（x²+4x+8)²+3x(x²+4x+8)+2x² (x²+4x+8)²+3x(x²+4x+8)+2x² 分解因式 3x/(x²-2x),(2x+1)/(4-x²),3/(2x²+4x)通分~ 两个初升高衔接教材的数学题.①(x²+x+1)(x²+x+2)-12=(x²+x+1)(x²+x+1+1)-12=(x²+x+1)²+(x²+x+1)-12=(x²+x-3)(x²+x+5)[十字相乘法]②(x²+x)²-8(x²+x)+12=(x²+x-2)(x²+x-6)[ 已知2x²+2x-3=0 求代数式x(x²-x-1)+2(x²+1)-1/3x(3x²+6x) 1(x²-9)/(x²+2x²+x)*(3x³+9x²)/(x³-3x),其中x=-1/3 计算：x²-6x+9/x²-x-6÷x²-9/x²-3x-10 乘以x+3/2x-10 计算x²-x/x²×x/1-x和x²-4y²/x²+2xy+y²÷x+2y/x²+xy 1.(8xy-x²+y²)-(x²-y²+8xy)2.(2x²-1/2+3x)-4(x-x²+1/2)3.3x²-[7x-(4x-3)-2x²] 因式分解：(x²-3x）²-2（x²-3x）-8 因式分解：(2x²-3x+1)²-22x²+33x-1