(1) -(x-1)(x+1)-(3-x)(-3-x) (2)(3x+4)(3x-4)+(-2x-3)(3x-2) 利用初二平方差公式计算

*-----------------------------------------------*| 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 || 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. x/x+(1-x)/x-1/x /X-3/-/X-1/ (3x/x-1) x-3(x-1) | X+1 |>| X-3 | x+3/x-1 (x +1)(x-3) (x+3)(x-1) |x+1|-|x-3| (x+1)(x-3) x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4 [x（x+1）+x平方（x-1)]+（-3x) x{x+1}{x-1}}x-2}{x-3}-40 x^5-x^4+x^3-x^2+x-1 |x+1|-|x|+|x-2|-|-x+3|已知x+2