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.
{7}\) is already in its simplest form. Subtracting fractions with the same denominator can be done in the same way. Try it out with these sample questions.
Over fifty years ago, the satirical television show Monty Python’s Flying Circus attacked the then emerging lowest-common-denominator approach to resolving complex issues in a skit where the ...