How to calculate fractional dimension?

[bmorgan]

HOw to calculate 3*x - x^2

 

[Mark44]

How to calculate the fractional dimensional of a string? And the string is written in decimal and alphabet. Thanks in advance.

You're going to have to give us more information than this, at least for me to understand what you're trying to do.

 

[Mark44]

HOw to calculate 3*x - x^2

OK, now that's an entirely different question from the one you first asked.

For a given x value,
1) Calculate 3 times x.
2) Multiply x by itself.
3) Subtract the result from step 2 from the result from step 1.

What does your question have to do with fractional dimensions?