Engineering Resonant frequency of a circuit

[gfd43tg]

Hello, I am working on this circuit to find the resonant frequency.

I calculate 10^8 rad/s, but the solution says it's 10^4 rad/s. Here is my work. I just solved for the equivalent impedance, and then separated the j term and solved for the inside of the parenthesis to be equal to zero.

Am I wrong or the solution?
Thank you

 

[Sumanth]

Hey, you should make imaginary part of impedance zero not the whole equation because at resonance the circuit will be purely resistive ...impedance doesnot equal zero

 

[gfd43tg]

Thank you very much, I solved it now!