hi guys, im not too sure how to do these questions:(adsbygoogle = window.adsbygoogle || []).push({});

solve for x,

a) (logx^3)^2 = logx^18

b) logx^3 + log(x^logx) = -2

so this is what i got so far:

a) (3logx)^2 = logx^18

9logx^2 = logx^18

18logx = logx^18

logx^18 = logx^18

... then i got stuck.... i was clueless and did not know how to solve for x.

b) 3logx + (logx)(logx) = -2

logx^2 + 3logx +2 = 0

so let logx = s

s^2 +3s + 2 = 0

(s+1)(s+2)=0

s=-1 or s=-2

... then again i got stuck... im not sure if what i did was right. our teacher gave us these questions that she has never taught us b4 and said this is ur assignment for the break... any help would be very much appreciated. thnx.

- Tu

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Help with logarithms pls

**Physics Forums | Science Articles, Homework Help, Discussion**