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What is th square root of 18?

Updated: 11/24/2022
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13y ago

Best Answer

The square root of 18 is the same as the square root of (9 x 2)

Since 9 is a perfect square, we know the square root of 9 is 3 so you take the 3 and bring it outside the square root sign.

3 x the square root of 2

Some teachers want you to leave it like that but if they want a decimal answer you need to use a calculator. The answer in this situation is 4.24

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13y ago
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Q: What is th square root of 18?
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