(x-5x-1)(x-5x+5)+5 急(x-5x-1)(x-5x+5)+5
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x/(x-2)-(1-x ² )/(x ² -5x+6)=(2-x)/(x-3) 解方程,急
(x-5x-1)(x-5x+5)+5 急(x-5x-1)(x-5x+5)+5
(x-1)(x+1)(x+3)(x+5)-33急
解九宫格题目(X为未知数)9 X 2 X 7 X 8 X XX X 4 X X 9 X 6 X1 3 X 5 X X X X 24 X X 8 5 X X 1 XX 8 9 4 X 1 6 7 XX 1 X X 3 6 X X 88 X X X X 2 X 3 6X 5 X 6 X X 9 X XX X 7 X 4 X 2 X 1
*-----------------------------------------------*| 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
x+4x+8=4x+11 x(2x-4)=5-8x解方程急!
计算(x*x+4x+5)/(x+2)-(x*x+6x+10)/(x+3)+1
3/x-1=4/x 6/x+1=x+5/x(x+1)
x(x平方-1)+2X平方(X+1)-3X(2X-5)帮个忙
2x/(x^2+x)-1/x=5/(x+1)怎么做?急!
求x的值 2.5:x=7.5:0.5 x= 2.4x+28.8=48 x= x-3分之2x=1.8 x= (1+5分之3)x=5分之2 x=x-3=3分之2 x= 15分之6:x=2:3 x= x:20分之7=4:x= x:0.6=4.5:2 x=急,
7.5[(X-2.5)/5-1]-5+2.5=X X=27.5 急
f(x)=x*x-5x+1/x*x*x,求导x的三次方分之x的平方减去5x加上1
(x平方+5x—6)除以(x-1)急啊!
解下列方程!就三道!解下列方程.1、x/x-2 - 1-x²/x²-5x = 2x/x-3(x/x-2 - 1-x²不是一起的!)2、5x/x²+x-6 - 5-2x/x²-x-12=7x-10/x²-6x+8(5x/x²+x-6 - 5-2x不是一起的!)3、x-4/x-5 + x-8/x-9=x-7/x-
化简x-2y+3x-4x+5x-...+2001x-2002x,急.
﹣(x²-5-4x)-x(x²+x-1),其中x=-1.先化简再求值