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Adding and Subtracting Radical Expressions - Problem 7

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Since a root written in simple radical form is actually more exact than a rounded decimal, we use the roots in real life situations, including geometry areas and perimeters. Remember that you can add or subtract radicals if and only if they have the same number under the radical sign. You might need to do some simplifying to tell if this is the case. The numbers outside the radical get added or subtracted, and the radicand, or the number under the square root, remains unchanged.

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