Save guides, add subjects and pick up where you left off with your BBC account. The notation \(3^2\) and \(2^3\) is known as index form. The small digit is called the index number or power.

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 \(\sqrt[3]{1728}\) ...