作业帮(4/x-5)+(x-3)/(12-x)=(x-45)/(x^2-17x+60)
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/02 18:25:33
(4/x-5)+(x-3)/(12-x)=(x-45)/(x^2-17x+60)
(4/x-5)+(x-3)/(12-x)=(x-45)/(x^2-17x+60)
(4/x-5)+(x-3)/(12-x)=(x-45)/(x^2-17x+60)
(4/x-5)+(x-3)/(12-x)=(x-45)/(x^2-17x+60)
(4/x-5)+(x-3)/(12-x)=(x-45)/(x-5)(x-12)
通分,两边同乘以(x-5)(x-12)得
4(x-12)-(x-3)(x-5)=x-45
-x^2+11x-18=0
x^2-11x+18=0
(x-2)(x-9)=0
x=2或x=9
经检验,都是方程的根!
*-----------------------------------------------*| 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 ||
3x·x-5x-122x·x·x-x·x-4x+3x·x·x-6x-5x·x+6x+64x·x+12x+7
通分:x+4/x^2-8x+15,x-5/x^2+x-12,x-3/x^2-x-20
3x-{-4x+{5x-(12x-10]+2}
1+x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8x+x^2+x^3+x^4+x^5+x^6+x^7+x^8+x^9+x^10+x^11+x^12=97.8 好多年没有用过过数学公式了 想不起来怎么算了 想知道 X值是多少
(4/x-5)+(x-3)/(12-x)=(x-45)/(x^2-17x+60)
4(x+5)(x+6)(x+10)(x+12)-3x*x
x+2/x+1-x+3/x+2-x+4/x+3+x+5/x+4
(x+3x+5x...+2009x)-(2x+4x+6x+...+2010x)
1x+2x+3x+4x+5x+6x+7x+8x+9x+10x+11x+12x+13x+14x+15x=550必须用解方程
x^5-x^4+x^3-x^2+x-1
求一个数独答案X X X 9 X X X 8 2 X 6 3 X X 1 4 X 99 X 8 X X X X X XX X X 6 7 X 3 X XX 4 6 X 5 X 2 9 XX X 7 X 2 3 X X XX X X X X X 7 X 17 X 4 3 X X 6 2 X6 3 X X X 7 X X X
数学化简3x-x^2/5x+4 x 18/4x-12(3x-x^2)/(5x+4) x 18/(4x-12)
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-
解方程 式子 6-2x+3x=3x-4x+3x+18 6-x+3x=2x-5x+1 2x-1=5x-36-2x+3x=3x-4x+3x+18 6-x+3x=2x-5x+12x-1=5x-3
x^2+8x+13/x^2+8x+15-x^2+5x+4/x^2+5x+62/x^2+4x+3+2/x^2+8x+15+2/x^2+12x+35
难倒爱因斯坦的九宫格X 7 X | X 8 1 | X X X |X X X | X 4 X | 7 5 9 |X X 5 | 7 X 9 | X 1 4 |5 X X | X X 8 | 3 9 X |3 9 6 | 4 X 7 | X X 2 |X 8 7 | 9 X X | X X X |4 X X | 6 X 5 | X X X | X X 4 | X X 1 |2 X X | X X X | X X X | X 3 X | X X X |X 6
x+2x+3x+4x+5x+6x+7x+8x+9x=9x-8x-7x-6x-5x-4x-3x-2x-x.x等于多少?