2x÷5咋算

2x÷5咋算 (-x)^5÷x^2 化简：2|x| -3x÷|2x-|5x|| *-----------------------------------------------*| 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 || 过程(x+2)(x+3)-(x-4)(x-5),其中x=2.咋算? (x^-3x+2/x^-5x+6)^2÷(x-1/x^2-2x-3)^2 化简：[(x+2)/(x^2-4)-(2x-5)/(x-4x+4)]÷[(x-3)/(x-2)] 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 1.(x^3-x^2-4x+1)/(x^2-3x+2)-(x^3-2x^2-9x+21)/（x^2-5x+6）+（x^2-3x+8）/（x^2-4x+3）2.{(x^2)/（x-y)}*{y/(x+y)}-{(x^4y)/(x^4-y^4)}÷{（x^2/x^2+y^2）^2} 化简：〔（x^2+18x+72)÷（x+12)-(x^2+5x-6)÷(x-1)〕·(x^3-2x^2-x+1) 16-x^2/x^2-2x-3÷1^2-5x+4/x-3 计算：(1)/(x-3)÷(x+2)/(x^2-9)-(1)/(x^2+5x+6) 8x^2-4x/x^2-x-6÷(x-3/x+2-x+2/x-3),其中x=5 化简：x^2-5x+6/x^2-1÷x-3/x+1 (-x^2n-2)*(-x)^5÷[x^n+1*x^n*(-x)]=? x^2-10x+25/x-1÷x^2-1/5-x (-x^2n-2)(-x)^5÷[x^n+1·x^n`(-x)] (16x^4-5x³+3x²-6x)÷(-2x)