6x2-(x-1)(x+2)-2(x-1)(x+3)整式运算

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 化简x/x2+x除以x2+x-2/x2-1+x+1/x+2 计算:x2-5x+6/x2-4x+3 + x2-4x+3/x2-2x+1 + x2-3x-4/1-x2 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 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 (x-2)(x2-6x-9)-x(x-5)(x-3)其中x= -1/3 解方程 2/(x2-x)+6/(1-x2)=7/(x2+x)x2为的平方 x2+2x+2/(x+1)=(x2+4x+6)/(x+2)-1 1-1/(x2+7x+6)=(x2-5x+5)/(x 2-5x+6) 解方程x-4/x2+x-2=1/(x-1)+(x-6)/(x2-4) (-2x)*(x2-5x+6)-4x(2x2-3x+1) 1/(x2+x)+1/(x2+3x+2)+1/(x2+5x+6)+1/(x2+7x+12)=4/21x2是x的平方 x2-4x+3分之x2-5x+6+s2-2x+1分之x2-4x+3+1-x2分之x2-3x-4的过程 3/x2 -3x+2-1/x-2=1/x2 -x+4/x2 -2x 通分 3x/x2-2x,2x+1/4-x2,3/2x2+4x x2+3x+2分之x-1减去x2-x-2分之6减去x2-4分之x-10x-1/x2+3x+2减去6/x2-x-2减去x-10/x2-4 约分x2+x-2/x2-x-6