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此式是怎么化出来的?
追答合并同类项,分母为x的分数可以合并,然后将常数项合并,最后等号两边交叉相乘
此式是怎么来的?
你的题目不是这个式子吗
追问您看错了。
是这个
已经解好了,谢了。
解方程:x+2\/x+1一x+4\/x+3=x+6\/x+5一x+8\/x+7
解方程:x+2\/x+1一x+4\/x+3=x+6\/x+5一x+8\/x+7 我来答 1个回答 #热议# 该不该让孩子很早学习人情世故?匿名用户 2014-04-10 展开全部 更多追问追答 追问 不清楚 追答 已赞过 已踩过< 你对这个回答的评价是? 评论 收起 为你推荐: 特别推荐 摸鱼为什么也会焦虑? 一分钟的MBTI性格测...
解方程:(x+2)\/(x+1)-(x+4)\/(x+3)=(x+6)\/(x+5)-(x+8)\/(x+7)
1-1\/(x+1)-1-1\/(x+3)=1+1\/(x+5)-1-1\/(x+7)1\/(x+1)-1\/(x+3)=1\/(x+5)-1\/(x+7)2\/((x+1)(x+3))=2\/((x+5)(x+7))(x+1)(x+3)=(x+5)(x+7)x^2+4x+3=x^2+12x+35 8x=-32 x=-4
初二数学 解方程 x+2\/x+1+x+8\/x+7=x+6\/x+5+x+4\/x+3
1\/(x+1)-1\/(x+3)=1\/(x+5)-1\/(x+7) 两边通分可得 [(x+3)-(x+1)]\/[(x+3)(x+1)]=[(x+7)-(x+5)]\/[(x+7)(x+5)]即2\/[(x+3)(x+1)]=2\/[(x+7)(x+5)]∴(x+3)(x+1)=(x+7)(x+5)x²+4x+3=x²+12x+35 4x+3=12x+35 x=-4 经...
初二数学 解分式方程:X+2\/X+1 +X+8\/X+7 = X+6\/X+5 + X+4\/X+3
(x+2)\/(x+1)+(x+8)\/(x+7)=(x+6)\/(x+5)+(x+4)\/(x+3)(x+2)\/(x+1))-(x+4)\/(x+3))=((x+6)\/(x+5)-(x+8)\/(x+7)通分,2\/(x+1)(x+3)=2\/(x+5)(x+7)(x+1)(x+3)=(x+5)(x+7)x=-3\/2 ...
(x+2\/x+1)-(x+4\/x+3)=(x+6\/x+5)-(x+8\/x+7)求过程
很明显(x+2\/x+1)=1+(1\/x+1),同理原式可化简为(1\/x+1)-(1\/x+3)=(1\/x+5)-(1\/x+7)通分化简得x²+4x+3=x²+12x+35,可得x=﹣8
x+2\\x+1-x+4\\x+3=x+6\\x+5-x+8\\x+7简便
x+2)\/(x+1)-(x+4)\/(x+3)=(x+6)\/(x+5)-(x+8)\/(x+7)每个式子都减去1,就是从分子里减去分母,得到 1\/ (x+1)-1\/(x+3)=1\/(x+5)-1\/(x+7)移项,得到1\/(X+1)+1\/(X+7)=1\/(X+5)+1\/(X+3)合并得到(2X+8)\/(X+1)(X+7)=(2X...
x+2\/x+1-x+4\/x+3=x+6\/x+5-x+8\/x+7 x=?
x+2\/x+1-x+4\/x+3=x+6\/x+5-x+8\/x+7 1+1\/(x+1)-1-1\/(x+3)=1+1\/x+5)-1-1\/(x+7)1\/(x+1)+1\/(x+7)=1\/(x+5)+1\/(x+3)(x+7+x+1)\/(x^2+8x+7)=(x+3+x+5)\/(x^2+8x+15)(2x+8)\/(x^2+8x+7)=(2x+8)\/(x^2+8x+15)(2x+8)(x^2+8x+15)...
解方程x+2分之x+1+x+7分之x+6=x+3分之x+2+x+6分之x+5
1\/x+7=1\/x+3+ 1\/x+6 (x+7+x+2)\/(x+2)(x+7)=(x+6+x+3)\/(x+3)(x+6)(2x+9)(x+2)(x+7)=(2x+9)(x+3)(x+6)(2x+9)(x^2+7x+2x+14)=(2x+9)(x^2+6x+3x+18)(2x+9)(x^2+9x+14-x^2-9x-18)=0 2x+9=0 x=-9\/2 经检验x=-9\/2是方程的解 ...
解方程x+1\/x+2+x+4\/+x5=x+2\/x+3+x+3\/x+4
解:分离常数:(X+1)\/(X+2)=(X+2-1)\/(X+2)=1-1\/(x+2), 同理 (x+3)\/(x+4)=1-1\/(x+4)(x+2)\/(x+3)=1-1\/(x+3) (x+4)\/(x+5)=1-1\/(x+5)所以 原方程可化为:2-1\/(x+2)-1\/(x+5)=2-1\/(x+4)-1\/(x+3)===>1\/(x+2)+1\/(x+5)=1\/(x...
解方程:(x+1\/x+2)+(x+6\/x+7)=(x+2\/x+3)+(x+5\/x+6)
解:原方程化为1-1 x+2 +1- 1 x+7 =1- 1 x+3 - 1 x+6 = 1 x+2 - 1 x+3即1 (x+6)(x+7)= 1 (x+2)(x+3),所以(x+6)(x+7)=(x+2)(x+3).x=-9 2 .经检验x=-9 2 是方程的根