Watch this video to learn about the rules of surds. For example, \(\sqrt 4 = 2\) is not a surd. However \(\sqrt 5\) is a surd. If you use a calculator, you will see that \(\sqrt 5 = 2.236067977...\) ...

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.

Tim Smith has 20+ years of experience in the financial services industry, both as a writer and as a trader. Gordon Scott has been an active investor and technical analyst or 20+ years. He is a ...

Julia Kagan is a financial/consumer journalist and former senior editor, personal finance, of Investopedia. Xavier Lorenzo / GettyImages If you're looking for a loan, finding the most affordable ...

Measuring—and delivering—what consumers really want by Eric Almquist, John Senior and Nicolas Bloch When customers evaluate a product or service, they weigh its perceived value against the asking ...

Insights from data and ML algorithms can be invaluable, but be warned — mistakes can be irreversible. These recent high-profile AI blunders illustrate the damage done when things don’t go according to ...