👉 Learn how to add or subtract radicals. A radical is a number or an expression under the root symbol. Radicals can only be ...

\({9}\) 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 ...