计算:(-x+2x2+5)+(4x2-3-6x)
计算:(-x+2x2+5)+(4x2-3-6x)
化简计算~1/(x2-5x+6) - 1/(4x-x2-3) - 1/(3x-x2-2)
计算:(1)x2+9xx2+3x+x2−9x2+6x+9
分式计算:2x/x2-x-2÷(1-x/x+1)-x2+2x/x2-4
计算:(-x2+5+4x)+(5x-4+2x2)
3x2-[7x-(4x-3)-2x2]
多项式x2-3x+2,x2-18x+32,x2+x-6的公因式是( )
计算极限 lim X2-3X+2 -------------- x→2 X2+5X-6
已知x2 3x-2=0,求2x-4╱x2 6x 9÷(x-3)×x2-9╱2x-x2的值
化简求值:3x2+(2x2-3x)-(-4x+5x2),其中x=2010.
计算[x(3-4x)+2x2(x-1)]÷(-2x)
证明:(x3+5x2+4x-1)-(-x2-3x+2x3-3)+(8-7x-6x2+x3)的值与x无关.