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 ...
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.
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.
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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
In math, it is sometimes important for us to be able to estimate the values of square roots (radicals). This is especially the case on exams which do not permit the use of a calculator, and you are trying to eliminate wrong answers, or check the reasonableness of your answer.
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