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a radical expression

-3√120
What is the answer of that radical expression?

$-3 \times \sqrt{120}$

$-3 \times \sqrt{30 \times 2 \times 2}$

$-6 \times \sqrt{30} \approx -32.863353450309966807418186968048$

You can't simplify it any more because the prime factors of 30 are 2, 3, and 5. You can approximate it as I have done.

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