(adsbygoogle = window.adsbygoogle || []).push({}); i am trying to sovle for x

log 3^x - log3(x+3) = 4

this problem i just cant solve i tried putting the log3/x+3 but i know it is not right so idk what to do please help



thanks

From what I can re-call...


log 3^x - log3(x+3) = 4

log 3 ^ x(x+3) =4

x(x+3) = 3 ^ 4

x^2 + 3x = 81

x^2 + 3x -81 = 0

Do the quadratic formula from there and the positive solution is your answer..I think.

-3 +- the square root of [9 -4(1)(-81)]

But if you do that, you get a negative, meaning the answer is imaginary... so either an answer with i or no solution.. Haven't done these in ages.

X = 81.
Simple

Me & maths don't get on so well.. i think i'm going to leave now..

the answer that i got was -243/80

Might be. I just searched that shit into google. I haven't taken a math class in years.

oh hahhah nice

x=:carling:

The solution is quite simple...

PM Elfmotat for the answer !!!