计算[x(3-4x)+2x2(x-1)]÷(-2x)
分式计算:2x/x2-x-2÷(1-x/x+1)-x2+2x/x2-4
计算[x(3-4x)+2x2(x-1)]÷(-2x)
x^2-1/x^2+4x+4÷(x+1)×x^2+3x+2/x-1计算
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
计算 x(x+3)-(x-1)(x-2)
计算:(-x+2x2+5)+(4x2-3-6x)
3x2-[7x-(4x-3)-2x2]
解方程 x(x-6)+2x(x-3)=3(x2-x-1) 解不等式:2x2(x-3)+4(x2-x)≥x(2x2-2x+
已知x2 3x-2=0,求2x-4╱x2 6x 9÷(x-3)×x2-9╱2x-x2的值
(x-6)(x2+x+1)-x(2x+1)(3x-1)
计算:[x(-4X+3)+(X-2)x]÷(-X)
计算 ∫(x^4-2x^3+x^2+1)/x(x-1)² dx