Question

What is the principal square root of 16

Answer 1

Your answer would be 4.

This is because the 'principal square root' means the positive square root of a certain number, and so √16 = 4 × 4, making 4 the answer. This has a certain term for it as √16 could equal -4 also (-4 × -4 = 16).

I hope this helps!

Answer 2

The principal square root 4 and its negative -4