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hyperlite
May 22, 2009, 05:31 PM
-3√120
What is the answer of that radical expression?

Perito
May 22, 2009, 08:27 PM
-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.