25%x+1/4x=13.2
25%x+1/4x=13.2
x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x
解方程:(2x+5)(4x*x-10x+25)=8x(x*x+1)
x*x+2x+x*x+10x+x*x+25+2x+x*x+1+1+16+x*x+4x*x+9-12x+16x*x+4-1
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
1/2x+1=1/2-1/3x x-2x+3x-4x+...+99x-100x=25
(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