x/x²+3-x²+3/4x=3怎么解?x/(x²+3)-(x²+3)/4x=3
来源:学生作业帮助网 编辑:作业帮 时间:2024/11/16 05:47:04
x/x²+3-x²+3/4x=3怎么解?x/(x²+3)-(x²+3)/4x=3
x/x²+3-x²+3/4x=3怎么解?
x/(x²+3)-(x²+3)/4x=3
x/x²+3-x²+3/4x=3怎么解?x/(x²+3)-(x²+3)/4x=3
4x应该都在分母里吧?
x/(x²+3)-(x²+3)/(4x)=3
设(x²+3)/x=y则原式化为
1/y-y/4=3
4-y²=12y
y²+12y=4
y²+12y+36=4+36
(y+6)²=40
y+6=±2√10
y=±2√10-6
(x²+3)/x=±2√10-6
x²+3=(±2√10-6)x
x²±(2√10+6)x+3=0
解一元二次方程你应该没有问题吧.
4×3-3X +1 = 0
×3 +1 +3 X ^ 3-3X
(X +1)(X 2-X +1)+3×(×2 -1)= 0
(X +1)(X 2-X +1)+3×(X +1)(X-1)= 0
(X +1)(X 2-X +1 + 3×2 3×)= 0
(X +1)(4×2 4×1)= 0
(X +1)(2X-1)2 = 0
X = -1或x = 1/2的
加个括号,题目看不懂