then a square root of 4 must be 2. \(2^2 = 4\). Reversing this gives \(\sqrt{4} = 2\). To find square roots or cube roots, work backwards from square numbers and cube numbers. If you know that ...

To find the cube root of a number, we have to find out which number ... Notice this is different to the square root symbol because there is a small subscript 3 in front of the \(\sqrt{}\).