2*3.14*【x+1】-2*3.14*x=?求两种简便解法,两种解法简便!

2X+3.14X=? *-----------------------------------------------*| 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. 因式分解 3.14×51^2-3.14×49^2 (3x+1)^2-(x-3)^2 x^2(x因式分解3.14×51^2-3.14×49^2(3x+1)^2-(x-3)^2x^2(x-y)^2-4(y-x)^2 分解因式----（X*X-X)(X*X-X-2)+1 2*3.14*【x+1】-2*3.14*x=?求两种解法, 】x(x+1)+x^2(x-1) 1/(1-x)+1/(1+x)+2/(1+x*x)+4/(1+x*x*x*x)+8/(1-x*x*x*x*x*x*x*x)怎么做 128.5-2x=3.14x+2x 1|2×3.14X+X=10.28 怎么算 3.14*2x=2（x+6. 3.14*（0.5x)(0.5x)*2x=50 3.14x除以2加x＝25.7求x 3.14*6^2*x=3.14*8^2*(2x/3-1),x是多少?急 1/4x=x/(2*3.14)+2*(3.14-2) x=? 3.14x²×2x＝94.2 20.7-2x=3.14x