A radical is basically the inverse of whatever the index is. For example, if 3 was n in the image above and 125 was x, the answer would be 5, since 5 * 5 * 5 equals 125. If there is no index or if the index is two, it is the inverse of square root. For example, if n was 2, ot n wasn't there, and 36 was x, the answer would be 6 since 6 * 6 = 36. Not always will you have perfect square roots, cube roots, etc. So sometimes you will have a coefficient on the outside of the radical. This basically just means that number times the radical. For example, if you have a square root of 56, which is not a perfect square root, if you put it in a calculator, it will give you a long decimal. So you would find the factors of 56, which are 8 and 7. Then split 8 into 4 and 2. and then 4 into 2 and 2. Once you find a pair of the same number, one of the numbers dies. So we have 2 on the outside on the radical and then 14 on the inside. There are many ways to use radicals such as reversing exponents and so many other ways.
(nvm thought this was a math question)
