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.

Steven Nickolas is a writer and has 10+ years of experience working as a consultant to retail and institutional investors. Hans Daniel Jasperson has over a decade of experience in public policy ...

I am the UK editor for Forbes Advisor. I have been writing about all aspects of household finance for over 30 years, aiming to provide information that will help readers make good choices with their ...

Aha!” moments are those places in time that you learn something you didn’t know before but that you cannot believe you didn’t realize all along. A more official definition of ...