6 (x÷3)=(5-2x)÷2的值是多少
来源:学生作业帮助网 编辑:作业帮 时间:2024/05/11 18:25:16
(1)(x+6)/(x^2+2x+1)-(x+4)/(x^2+x)=0(x+6)/(x+1)²-(x+4)/[x(x+1)]=0都乘以x(x+1)²得,x(x+6)-(x+4)(x
(x+1-1/1-x)÷(x-x²/x-1)=[(x+1)+1/(x-1)]×[-(x-1)/x(x-1)]=(x²-1+1)/(x-1)×(-1/x)=-x/(x-1)(x-4/
1)(x-3)/(x-2)-(x-5)/(x-4)=(x-7)/(x-6)-(x-9)/(x-8)化简得【(x-3)(x-4)-(x-5)/(x-2)】/【(x-2)(x-4)】=【(x-7)(x-8
x(1+2+...+9)=x(9-8-7-...-1)x=0记得采纳啊
2x+3x+4x+5x+x+6x+7x=10028x=100x=100/28x=25/7
两边乘x(x-1)6x-3(x-1)=x+56x-3x+3=x+52x=2x=1经检验,x=1时分母x-1=0是增根舍去所以方程无解
(x+2/x²-2x-x-1/x²-4x+4)÷x-4/x={(x+2)(x-2)/[x(x-2)²]-x(x-1)/[x(x-2)²]}·x/(x-4)={(
注意:本题x=2时题目没意义,应该舍去(这是很多学生错误所在)这里x只能取根号2-1
6/(x+1)=(x+5)/[x(x+1)]6x=(x+5)(两边同乘x(x+1))5x=5(合并同类项)x=1(3-x)/(x-4)+1/(4-x)=1(3-x)-1=(x-4)(两边同乘(x-4)
原式=2x(x-2)/(x+2)×x(x+2)/(x-2)²×3(x-2)/x=6x当x=√3/2时原式=3√3
x/(x-2)=2x/(x-3)+(1-x)/(x-5x+6)x/(x-2)=2x/(x-3)+(1-x)/(x-2)(x-3)x(x-3)/(x-2)(x-3)=2x(x-2)/(x-2)(x-3)
1.(x^3-3x^2)/(x^2+5x+6)÷(x^3-9x)/(x^2+2x-3)*(x+2)/(2x)=x^2(x-3)/(x+2)(x+3)*(x+3)(x-1)/x(x+3)(x-3)*(x
5x-3(2x+1)=6x-4(5-3x)求x5x-6x-3=6x-20+12x20-3=6x+12x-5x+6x19x=17x=17/19
x^2+2x+5=7所以x^2+2x=23x^2+6x+3=3(x^2+2x)+3=3*2+3=9再问:2怎么会变6?再答:3x^2+6x+3是题目给的x^2+2x=2是我根据题意化简得来的再问:??
原式化简:{(x-3)(x-2)/(x-3)(x-4)}²÷{(x+1)(x+2)/(x-4)(x+2)}²{(x-2)/(x-4)}²÷{(x+1)/(x-4)}
原式=2(x-3)/(x-2)²×1/(x+3)×(x-2)(x+3)/[-(x-3)]=-2/(x-2)当x=-1/2时原式=-2/(-5/2)=4/5
原式=(x-1)(x的平方+x+1)÷(x-1)=x的平方+x+1原式=(9x立方-6x平方+x-6x+2﹚÷﹙3x-1﹚=[x(3x-1)平方-2(3x-1)]÷﹙3x-1﹚=x(3x-1)-2=3
x²+3x-1=0x²+3x=1(x-3)/3x²-6x)/[(x+2-5/(x-2)]={(x-3)/[3x(x-2)]}/{[(x+2)(x-2)-5]/(x-2)]