Answer:The principal square root is the positive number square root. Unless otherwise stated, "the square root" of a number refers ONLY to the principal square root. The square root of n2 is the absolute value of n. When solving a simple equation such as x2 = 25, it must be observed that there are two solutions.Step-by-step explanation:The principal square root is the positive number square root. Unless otherwise stated, "the square root" of a number refers ONLY to the principal square root. The square root of n2 is the absolute value of n. When solving a simple equation such as x2 = 25, it must be observed that there are two solutions.