Thank you so much for your help,
I want to solve and find a formula for x,
in reality, this is a periodical equation and (x) is the time that the waveform goes to zero,
5<a<15 , -20e+6<b<-2e+6 , 10<z<13 , 1e+6<w<10e+6
I wanted to use your way but I couldn't find the last formula for (x) ,
is it possible for you to help me more?
Thank you so much for the time that you give me,
Sincerely,
Ramtin