Re: Maths Help.
 

I still have my old slide rule:D

Re: Maths Help.
 

But can you remember how to use your guessing stick.


Multiplication/division
any root

the rest I have forgotten how to use logarithmic scales

Re: Maths Help.
 

Sure i've a book of logarithims up the loft. remember to show your working.

Re: Maths Help.
 

My old maths teacher used to joke that logs were introduced by a constipated mathematician. He used to crack terrible jokes all the time

Re: Maths Help.
 

18x^3+340x-6351=0 is a cubic equation so has three roots. However, two of them are complex roots:

6.180531691302737
-3.0902658456513685+6.89478918309233i
-3.0902658456513685-6.89478918309233i

Use the Cubic solver here

Re: Maths Help.
 

Re: Maths Help.
 

What is ^3 mean?

Is it 18x cubed?

Re: Maths Help.
 

Shorthand used to signify cubed etc. x³ is difficult to type unless you know all the alt characters and hope the reader has the correct character set.

Re: Maths Help.
 

Plus when you find an online calculator like those posted above (Or mathcad if you can afford the license) it often won't recognise x³ so asks you to input it as x^3