Can You Solve the Equation (3^x) - (3^-x) = 4?

[rise]

how can u solve this equation (3^x)-(3^-x)=4...hehe:P
please i really need it fast..TT

 

[statdad]

"please i really need it fast."

That's not how it works - you need to show some of your first tries, or explain what you've done that hasn't worked. At that time you may receive hints.

 

[razored]

Hmm.. to get you started, multiply everything by 3^(x).. from there everything is bright and clear.

 

[sutupidmath]

then take a substitution of the form t=3^x so u'll get a quadratic eq.

 

[Mentallic]

once you get you solve the quadratic, don't forget to substitute 3^x=t back again

 

[dirk_mec1]

Guys we've helped enough now let the OP do the math.

 

[rise]

damn!you people are damn good!:P i tried many times but nothing happens..THX GUYS:)