9x²/2+3x/2-1=0
(x+1)(x+2)(x+3)x+1=0则3x²+9x+7
x^4+x^3+x^2+x+1=0,x^2006+x^2005+x^2004+x^2003+x^2002
解方程 x(x+1)-x-9=0 x²-2x=224 x(x-2)=2(2-x) x²-(2(√2)
解方程 (3x+1)(3x-1)=(x+2)(9x-4) 2(x-3)(x-2)-(x+3)²=(x-1)(x
解方程(3x^2+9x+7)/(x+1)-(2x^2+4x-3)/(x-1)-(x^3+x+1)/(x^2-1)=0
解方程(x²-3x)/(x²-1)+(2x-1)/(x-1)=0
1/x+1/x(x+1)+1/(x+1)(x+2)+1/(x+2)(x+3)+...1/(x+9)(x+10)=0
方程(x+1)(x+2)(x+3)(x+4)(x+5)(x+6)(x+7)(x^2+8x+9)+64=0
(x+2)(x-3)(x-6)(x-1)=0
x²+3x+9/(x²-27)+6x/(9x-x²)-(x-1)/(6+2x)
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
已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^5+x^6+x^7+x^8的值