Roots
A root is the opposite of a power. The root of a number is another number that can be multiplied by itself to get the first number.
As 2 squared is 4, 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 \(15^2= 225\), then you also know that \(\sqrt{225} = 15\). If you know that \(5^3 = 125\) then you also know that \(\sqrt[3]{125} = 5\).