x^2-6x+6=0

x(x+2)(x+6)+20x+6=0 (x^-2x)^-5(x^-2x)-6=0 (x+2)(x-3)(x-6)(x-1)=0 6/(x-1)-(x+2)/x(x-1)=0 已知1+x+x^2+x^3=0,求x+x^2+x^3+x^4+x^+x^6+x^7+x^8的值 如果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, 1/(x*x-2x-3)+2/(x*-x-6)+3/(x*x+3x+2)=0 5(x的2次方+X-3)-4x(6+x)+x(-x+4)=0 x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x/x-2+x-9/x-7=x+1/x-1+x-8/x-6, x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少? 若2x-3y+4=0则x（x*x-1)+x(5-x*x)-6y+7 *-----------------------------------------------*| 6 4 X | 8 X X | X X 5 || X X X | X X X | X 7 8 || X X X | X X X | X X X ||---------------+---------------+--------------- || X X X | X X X | 5 1 X || X X X | X 6 X | X X X || 8 X X | 3 5 X | 2 X X || 解方程x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6) 2x+3x+4x+5x+x+6x+7x=100 (x/x-2)+(2/x*2+2x)-(x+6/x*2-4)化简,=x^2/x(x-2)+(2x-4)/x(x^2-4)-(x^2+6x)/x(x^2-4)=x^2/x(x-2)-(x+2)/x(x-2)=(x-2)(x+1)/x(x-2)=(x+1)/x 设常数a>=0 解方程x*x*x*x+6x*x*x+(9-2a)x*x-6ax+a*a-4=0 已知集合M={x|x^2+6x-16>0},N={x|(x-k)(x-k-2)0},N={x|(x-k)(x-k-2)