0.75:x+1=1/4
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
0.75x-1/2x=-5;3x+5=4x+1;3X+5=4X+18;1-7x=x-7;9x+8-7x=3x;-(x-2
提取公因式:已知x*x-5x+1=0 求x*x*x-4x*x-4x-1
解方程(x/x(x+2))+(x/(x+2)(x+4))+.+x/(x+8)(x+10)=1
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
解方程:(1)x-0.75x=12(2)2.8x+x=7.6(3)2.36x+2.64x=18(4)3.5x-1.5x=
(X+4)(x-2)(x-4),其中x=-1
(x^2+x-1)(x^2+x+2)=4
(1)3x(x+0.2)=4x(x-1.1)
1/(x-4)(x-3)+1/(x-3)(x+2)+1/(x-2)(x-1)+1/(x-1)x+1/x(x+1)=1/x
y=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10)的导数在x=1
(4x+2)/x+(4x-22)/(x-5)=(x-6)/(x-4)+(7x+9)/(x+1)