Homework Help: General Maths question...

1. Aug 9, 2016

Andy86

please can someone very kindly verify this is correct?
Thanks
Andy

2. Aug 9, 2016

Staff: Mentor

I moved the thread to our homework section.

Did you plug the result into the original equation to check? You can also use tools like http://www.wolframalpha.com for that.

You use "x" for two different things, that notation is very confusing.

3. Aug 9, 2016

Andy86

Hi MFB.

Yes I plugged it and it came out ok! Just wanted it checking as my logarithm work is self taught of youtube vids so not confident! :-)

Thanks
Andy

4. Aug 9, 2016

Staff: Mentor

@Andy86, the problem statement is unclear. What you wrote appears to be $3\cdot4$ and $8\cdot5$. If you meant 3.4 and 8.5, the decimal point needs to be lower so that it won't be confused with the raised dot ($\cdot$) that denotes multiplication.

5. Aug 9, 2016

Ray Vickson

To get around the problem described in post #4, you should type out the problem (and preferably, the solution also).

For example, if you mean that $3.4^{2x+3} = 8.5$ you would type that as 3.4^(2x+3) =8.5. But, if you mean that $3 \times 4^{2x+3} = 8 \times 5$ you would type that as 3*4^(2x+3) = 8*5. Finally, if you mean that $(3 \times 4)^{2x+3} = 8 \times 5$ you could type that as (3*4)^(2x+3) = 8*5. Generally, posted images of problems and solutions are discouraged, for a number of very good reasons.