# Thread: Exponential & Logarithmic Equations

1. ## Exponential & Logarithmic Equations

3e^(4x)-9e^(2x)-15=0
I tried to solve this question and I couldn't finish solving it. Can you please show me how i would do this?

2. ## Re: Exponential & Logarithmic Equations

Originally Posted by paigesisco
3e^(4x)-9e^(2x)-15=0
I tried to solve this question and I couldn't finish solving it. Can you please show me how i would do this?

Can you solve $3y^2-9y-15=0~?$

4. ## Re: Exponential & Logarithmic Equations

Originally Posted by paigesisco
When solving it plato's way did you remember to find x after you found the value(s) of y?

5. ## Re: Exponential & Logarithmic Equations

Yes i did that. Can you solve the equation out for me fully so that i can understand it in former questions

6. ## Re: Exponential & Logarithmic Equations

Originally Posted by paigesisco
Yes i did that. Can you solve the equation out for me fully so that i can understand it in former questions

You should get $e^{2x}=\frac{3+\sqrt{29}}{2}$.