(x-2)(x2-6x-9)-x(x-5)(x-3)其中x= -1/3

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 (x2-x)2+6(x2-x)+9 (x-2)(x2-6x-9)-x(x-5)(x-3)其中x= -1/3 解方程：1/x2+x +1/x2+3x+2 +1/x2+5x+6 +1/x2+7x+12 +1/x2+9x+20=5/x2+11x-708解方程：1/x2+x +1/x2+3x+2 +1/x2+5x+6 +1/x2+7x+12 +1/x2+9x+20=5/x2+11x-708 约分x2+x-2/x2-x-6 x2+3x+9/x2-27+6x/9x-x2-x-1/6+2x 化简 化简x2+3x+9/x2-27+6x/9x-x2-x-1/6+2x x2-5x+6 x2-5x+6 1-1/(x2+7x+6)=(x2-5x+5)/(x 2-5x+6) (x-x2)(x2+x-6)分之(x2+3x)(x2-3x+2) (-2x)*(x2-5x+6)-4x(2x2-3x+1) 计算:x2-5x+6/x2-4x+3 + x2-4x+3/x2-2x+1 + x2-3x-4/1-x2 因式分解 (x2-2x-x)(x2-2x+4)+9 解方程：1/x2+x +1/x2+3x+2 +1/x2+5x+6 +1/x2+7x+12 +1/x2+9x+20=5/x2+11x-708等会就要 再次坐等 函数f(x)=(x2-2x+9)/x(x 计算极限 lim X2-3X+2 -------------- x→2 X2+5X-6lim X2-3X+2------------x→2 X2+5X-6 1/(x2+x)+1/(x2+3x+2)+1/(x2+5x+6)+1/(x2+7x+12)=4/21x2是x的平方