3/1=4/x 2怎么解
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设(x²-1)/(x²+2x)=t则8t+3/t=118t²-11t+3=0(8t-3)(t-1)=0解得t=3/8或t=11.t=3/8(x²-1)/(x
后面的x²+11x-708有误吧!再问:没有题目就这样能不能帮我再答:那我就试试:原式为:1/x2+x+1/x2+3x+2+1/x2+5x+6+1/x2+7x+12+1/x2+9x+20=5
x2+3x2+1=0中的3x2表示什么?再问:已知X2+3X+1=0,求X2+1/X2的值?得数是7。求过程?我打的是X的平方。怎么会出X2、再答:答:因为x≠0,两边都除以x得:x+1/x=-3,两
1、x^2+4x=10(x+2)^2-4=10(x+2)^2=14(x+2)=正负根号14x=(正负根号14)-22、x^2-6x=11(x-3)^2-9=11(x-3)^2=20(x-3)=正负2倍
3/x2=1/x2-x即3*2-3x=x*22x*2=3Xx=0(舍去)x=3/2
(1)x2+4x+4=1+4,∴(x+2)2=5,∴x+2=±5,∴x1=5-2,x2=-5-2;(2)整理得2x(x+3)-(x+3)=0,∴(x+3)(2x-1)=0,∴x+3=0或2x-1=0,
等式两边同时乘以(x+3)(x-2)(x+2)就可以去分母了
7/(X2+X)+3/(X2-X)=6/(X2-X),去分母,等式两端同时乘X(X+1)(X-1):7(X-1)+3(X+1)=6(X+1),7X-7+3X+3=6X+6,7X+3X-6X=6+7-3
4x+24-2x=382x=14x=7再问:亲,请问24怎么来的再答:12*2再答:(12-x)*2=24-2x再问:哦,谢谢
用短除法或二分法.
(2x^2-4x-3)/(x^2-2x-1)-3=0{(2x^2-4x-3)-3(x^2-2x-1)}/(x^2-2x-1)-=0{-x^2+2x}/(x^2-2x-1)=0-x(x-2)/(x^2-
4x+18x2=584x+36=584x=58-364x=22x=22÷4x=5.5不懂可追问,有帮助请采纳,谢谢!
(1)4x2-3x=52移项得,4x2-3x-52=0,(x-4)(4x+13)=0,x1=4,x2=-134.(2)5x2=4-2x原方程可化为5x2+2x-4=0,a=5,b=2,c=-4,△=4
1/(x²-5x+6)-1/(x²-4x+3)+1/(x²-3x+2)=1/(x-1)1/[(x-2)(x-3)]-1/[(x-1)(x-3)]+1/[(x-1)(x-2
7/(x+x2)-3/(x-x2)=6/(x2-1)两边同乘以x(x+1)(x-1),得7(x-1)+3(x+1)=6x7x-7+3x+3=6x10x-6x=3-74x=-4x=-1经检验x=-1是增
两边乘x(x+1)(x-1)2(x-1)+3(x+1)=4x2x-2+3x+3=4x5x+1=4xx=-1经检验,x=-1时分母x+1=0增根,舍去方程无解
x²+x-1/(x²+x)=3/2两边同时乘以(x²+x)得:(x²+x)²-1=3(x²+x)/22(x²+x)²-3
x^3+3x^2-4x=0x(x^2+3x-4)=0x(x+4)(x-1)=0∴x1=0,x2=-4,x3=1
令(x^2-1)/x=t3/t+t/2=5/2t^2-5t+6=0t=2或t=3即:(x^2-1)/x=2或(x^2-1)/x=3x^2-2x-1=0或x^2-3x-1=0x=1±√2或x=(3±√1
很难,因为不能变成系数为整数甚至分数的因式积.