(3x+5)^2-5(3x+5)-6=0

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 x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) 2x+3x+4x+5x+x+6x+7x=100 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 x^5+x^4 = (x^3-x)(x^2+x+1)+x^2+x x/x-3-5x/x^2-x-6计算 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 |X-1|+|X-2|+|X-3|+|X-4|+|X-5|+|X-6|+|X-7|+|X-8|+|X-9|+|X-10| x-4x-5=0 x(x-2)=3x-6 设函数f(x)=(x-1)(x-2)(x-3)(x-4)(x-5)(x-6)(x-7)(x-8)(x-9)(x-10), 解方程：(4/x-2)+(x-1/x-5x+6)+(2/3-x)=0