Rationalising an expression means getting rid of any surds from the bottom (denominator) of fractions. Usually when you are asked to simplify an expression it means you should also rationalise it.

When multiplying fractions, multiply the top numbers (numerators) together and multiply the bottom numbers (denominators) together, then simplify or it is sometimes easier simplify first.

The datatype supports different floating point representations depending on the definitions of the mantissa M and exponent E widths through the template. For example: fast_float<23,8> is used for the ...