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math.wonderhowto.com/how-to/evaluate-square-roots-318753

This is the video about how to evaluate square roots. The square root of a number is a number that you can square to get it, that is, a number that you can multiply by itself to get the number. So, 2 is a square root of 4, because 2 x 2 = 4, and 3 is a square root of 9, because 3 x 2 = 9. (-2) x 2 is also 4 and (-3) x 2 is also 9. Numbers that have square roots always have two, a positive one ...

courses.lumenlearning.com/.../chapter/evaluating-square-roots

The square root could be positive or negative because multiplying two negative numbers gives a positive number. The principal square root is the nonnegative number that when multiplied by itself equals [latex]a[/latex]. The square root obtained using a calculator is the principal square root.

A square root is a number thet can be multiplied by two other numbers that are exactly the same like the square root of 16 is 4 because 4x4 is 16.

A tutorial explaining how to evaluate both positive and negative square roots.

www.homeschoolmath.net/teaching/square-root-algorithm.php

You are here: Home → Articles → Square Root Algorithm How to calculate a square root without a calculator and should your child learn how to do it. Most people in today's world feel that since calculators can find square roots, that children don't need to learn how to find square roots using any pencil-and-paper method.

www.math.com/students/calculators/source/square-root.htm

Free math lessons and math homework help from basic math to algebra, geometry and beyond. Students, teachers, parents, and everyone can find solutions to their math problems instantly.

study.com/.../evaluating-square-roots-of-perfect-squares.html

Squares and square roots are inverse, or opposite, operations involving radicals. Learn how to determine the square root of perfect squares in this lesson. 2013-10-23