X÷3＋300-3X

X÷3＋300-3X X×X－3X＋1=0求分式X×X÷〈X×X×X×X+3X×X+1〉 x²＋2x/x²-6x+9÷x²-4/x²-3x , 化简3x-2/(x+y)[(x+y)/3x-x-y]÷(x-y)/x [x^2+2x-8/x^3+2x^2+x]÷[(x-2/x)×(x+4/x+1)]化简[x^2+2x-8/x^3+2x^2+x]÷[(x-2/x)×(x+4/x+1)]化简 (x^2-x-6)÷(x-3) 化简 [3x/(x+2)-x/(x=2)]÷x/(x^2-4)化简 [3x/(x+2)-x/(x-2)]÷x/(x^2-4 3x/(x-2)-x/(x+2)÷2x/(x-4)化简3x/（x-2）-x/(x+2)÷2x/(x²-4)化简 (x+1-1/1-x)÷(x-x²/x-1) (x-4/x-x-6+ x+2/x-3)÷x+1/x-3 x-3／x²-1 ÷ （x-3）（x+1）／x²+2x+1 ＋ 1／x+1,其中x=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-3)的平方/3X＋X-3/X (X-3)的平方/3X＋X-3/X x(x*x-6x-9)-x(x*x-8x-15)+2x(3-x) 化简：2|x| -3x÷|2x-|5x|| 化简||x|-2x|÷(|x-3|-|x|) (2x+300)(x-4)-2(x+2)(x-3) 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