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**diamond777****Member**- Registered: 2011-07-19
- Posts: 20

seventy years young student of maths is fun

In need of lots of help!

lets start with:

algebra - working with exponents and logarithms-

question five

solve (for x)

2log3(x)=5

answer D x = 9square root(3)

i presume the 2 means that x is squared in the question?

please explain what 9square root of (3) is and how it is the square root of 243?

thank you ....

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 103,751

Hi diamond777;

seventy years young student of maths is fun

In need of lots of help!

Divide both sides by 2

3^x both sides.

Welcome to the forum, young man.

**In mathematics, you don't understand things. You just get used to them.****If it ain't broke, fix it until it is.** **A number by itself is useful, but it is far more useful to know how accurate or certain that number is.**

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**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 20,769

Hi diamond777,

**Welcome to the forum!**

It is no good to try to stop knowledge from going forward. Ignorance is never better than knowledge - Enrico Fermi.

Nothing is better than reading and gaining more and more knowledge - Stephen William Hawking.

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