6x^2+5x-50=0

(x^-2x)^-5(x^-2x)-6=0 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, 5(x的2次方+X-3)-4x(6+x)+x(-x+4)=0 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 5（x²+17)-6(x²+2x)=0 (50-x)(30+2x)=21005（x²+17)-6(x²+2x)=0(50-x)(30+2x)=2100 *-----------------------------------------------*| 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 已知2x*x+x-5=0,求代数式6x*x*x+7x*x-13x+11的值 已知2{x*x}+x-5=0 求6{x*x*x}+7{x*x}-13x+11的值“*”这个符号是乘号 x-4x-5=0 x(x-2)=3x-6 解方程：(4/x-2)+(x-1/x-5x+6)+(2/3-x)=0 x^2+5x-990=0,求x^3+6x^2-985x+2010 x+2/x+1-x+4/x+3=x+6/x+5-x+8/x+7 x=? (3/x)+(6/x-1)+(x+5/x-x^2)=0 填九宫格帮帮忙.x x 6 x x 7 x x 98 x x x 3 x 1 x x 9 x x 6 x 5 x 3 x x x 3 x x x x 1 8x x x 9 x 1 x x x2 1 x x x x 6 x x x 6 x 7 x 3 x x 1 x x 9 x 2 x x x 47 x x 8 x x 5 x x 1.(x*2-3x+3)/(x*2-3x+2)-(x*2-5x+7)/(x*2-5x+6)-1/(x*2-4x+3)2.1/x(x+1)+2/(x+1)(x+3)+3/(x+3)(x+6) 3.已知：x*2-3x+1=0,求x*2+1/x*2.