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How do you do square roots with variables?

Updated: 8/19/2019
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13y ago

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Examples:

√(4a) = 2√a

√(8a2) = √(4*2*a2) = 2|a|√2, if a > 0 then √(8a2) = 2a√2

√(81a4) = 9a2

√(27b7) = √(9*3*b6*b) = 3|b3|√(3b), if b > 0 then √(27b7) = 3b3√(3b)

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Q: How do you do square roots with variables?
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