Finding a solution to the equation x3^(2x+1)=9x

  • Thread starter Mppl
  • Start date
  • #1
13
0
how can I know that zero is the solution of x3^(2x+1)=9x

I mean I know that it is the solution cause if I substitute zero I'll get an equality but how can I find it?
 

Answers and Replies

  • #2
Is this the equation you want to solve:
[tex]x3^{2x+1}=9x[/tex]?
If so, [tex]x3^{2x+1}=9x\Leftrightarrow x(3^{2x+1}-9)=0\Leftrightarrow x=0\text{ or } 3^{2x+1}=3^2\Leftrightarrow 2x+1=2\Leftrightarrow x=\frac{1}{2}[/tex]
 
  • #3
13
0
oh thanks man, all I could think about was to devide both sides by x. Thats so simple...

Thank you very much
 
  • #4
Just happy to help
 

Related Threads on Finding a solution to the equation x3^(2x+1)=9x

  • Last Post
Replies
2
Views
646
Replies
1
Views
2K
  • Last Post
Replies
2
Views
1K
Replies
5
Views
4K
  • Last Post
Replies
3
Views
9K
Replies
5
Views
769
  • Last Post
Replies
1
Views
29K
  • Last Post
Replies
10
Views
2K
  • Last Post
Replies
2
Views
3K
Replies
8
Views
6K
Top