Exponential & Logarithmic Equations

**paigesisco** · March 14th 2013, 09:05 AM

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?

**Plato** · March 14th 2013, 09:07 AM

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

**paigesisco** · March 14th 2013, 09:13 AM

I have tried but my answer comes out wrong, can you please help?

**Shakarri** · March 14th 2013, 09:15 AM

Originally Posted by paigesisco

I have tried but my answer comes out wrong, can you please help?

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

**paigesisco** · March 14th 2013, 09:19 AM

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

**Plato** · March 14th 2013, 09:24 AM

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

Thread: Exponential & Logarithmic Equations