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: \(2^2 = 4\).

Years ago, no math education was complete without understanding how to compute a square root. Today, you are probably just reaching for a calculator, or if you are writing a program, you’ll probably ...