x^20/[(-x^2)^3]^2-x^2 * (-x)^3/(-x^2)^2

*-----------------------------------------------*| 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 || 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 七年级下册政治复习提纲(山东人民出版社)第五单元是 青春的脚步 青春的气息别弄错了啊!格式：X X X X X X X X X 1、X X X X X X X X X X.2、X X X X X X X X X.3、X X X X X X X X X X X. 通分:x+4/x^2-8x+15,x-5/x^2+x-12,x-3/x^2-x-20 x(x-2)(x-3) {x|(x+3)(x-2) -x^3+x^2-x x×x+3x-9/ x+2 x+2x+3x+.+100x (x*x-3)*(x*x-3)-x*(x*x-3)-2x*x 因式分解 2(x^2-x)^2-3(x^2-x)-20 因式分解(x+1)(x-2)(x-3)(x-6)+20 16x-x^3/x^2+x-20约分 3(x^4)^6-2(x^5×x^3)^3+x^11×x^13+x^20×x^3×x 计算:1/x(x-1)+1/(x-1)(x-2)+1/(x-2)(x-3)+.+1/(x-19)(x-20) 2x(x-1)-x(3x+2)=(-x-1)(x+6)-20 解方程X(X+1)-X(X-3)=2(X+1)(X-1)+20