Decimal place issues with floats and decimal.Decimal

Question

I seem to be losing a lot of precision with floats.

For example I need to solve a matrix:

4.0x -2.0y 1.0z =11.0
1.0x +5.0y -3.0z =-6.0
2.0x +2.0y +5.         


        

Answer 1

Also see What is a simple example of floating point error, here on SO, which has some answers. The one I give actually uses python as the example language...