Answer by
willard (874)

Generally, there is no formula for adding square roots, other than finding the decimal values
of each and adding them together. In some cases, the sum of roots can be simplified by factoring
out perfect squares, i. e. root(3) + root(12) = root(3) +root(4)*root(3) = root(3) +2 *root(3)
= 3*root(3).