(x^2+13x+42)/(x+6)写出过程

(x^2+13x+42)/(x+6)写出过程 写出x 分解因式x^8+x^6+x^4+x^2+1写出具体过程 一道初二数学计算题 3/x(x+2)+3/(x+2)(x+4)+3/(x+4)(x+6)+.+3/(x+20)(x+22)请写出过程,谢谢! *-----------------------------------------------*| 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 || 解分式方程：1/X-2+1/X-6=1/X-7+1/X-11/X-2+1/X-6=1/X-7+1/X-11/(x-2)-1/(x-1)=1/(x-7)-1/(x-6)(x-1-x+2)/(x-2)(x-1)=(x-6-x+7)/(x-7)(x-6)1/(x-2)(x-1)=1/(x-7)(x-6)(x-2)(x-1)=(x-7)(x-6)x^2-3x+2=x^2-13x+4213x-3x=42-210x=40x=4 为什么要移向才能解 x(x*x-6x-9)-x(x*x-8x-15)+2x(3-x) 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 计算1、（x^2+13x+42)/(x+6) 13+3x=28写出解方程还有6*5+2x=44 若实数x满足条件（x²-5x+6）²+|x-2|=0 求x的值 写出x的x方根 解下列不等式和不等式组,写出解集（要步骤）①5x+15>4x-13 ②2x-1/3≤3x-4/6 ③{ x-5＞1+2x ④{ x-x-2/2≤1+4x/33x+2＜4x 1+3x＞2（2x-1） 1、|x-|3x+6||>42、|2x-|x-2|| 因式分解(x-1)(x+2)(x+3)(x+6)-13 (x-1)(x+2)(x+3)(x+6)-13 3(x^4)^6-2(x^5×x^3)^3+x^11×x^13+x^20×x^3×x 解方程((13x-x^2)/(x+1))(x+(13-x)/(x+1))=42 (13x-x^2)/(x+1)[x+(13-x)/(x+1)]=42