Module 8 (M8) - Algebra - Surds Surds are irrational numbers containing a square root sign. They are square roots of numbers that are not square. Irrational numbers cannot be expressed as fractions.

\({9}\) is a square number. \(3 \times 3 = 9\) \(3 \times 3\) can also be written as \(3^2\). This is pronounced "\({3}\) squared". \({8}\) is a cube number. The ...