\({9}\) 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 ...

Notice this is different to the square root symbol because there is a small subscript 3 in front of the \(\sqrt{}\). Using the cube root button on the calculator we see that \(\sqrt[3]{1728}\) ...