3X(x^2-2x-1)-2x^2(x-3)=多少
1X+2X+3X…+98X+99X+100X=50500X X等于多少?
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
(-x)1(-x)2(-x)3(-x^4)等于多少
(x+1)(x+2)(x+3)(x+4)等于多少
2x(5x+3)=3x(5x+3x)中x等于多少
x-1)(X-2)(x-3)...(x-50)+x(x-2)(X-3)...(X-50)+...+x(x-1)(x-2)
(x-1)(x-2)(x-3)(x-4)=0,求x等于多少,
4x-3(x-5)=2x+(x-1) x等于多少
解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4