With your square root in simplest terms, it's usually fairly easy to get a rough estimate of a numerical answer by guessing the value of any remaining square roots and multiplying through. This would give you 81, making 9 your square root.Įstimate, if necessary. You could then go a little lower and multiply 9 by 9. You could go a little higher and multiply 10 by 10 to get 100, which is too high. Let's say you were trying to find the square root of 81-you could multiply 7 by 7 to get 49, which is too low.
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