Question 1199927
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This has been previously answered at the following links:
<a href = "https://www.algebra.com/algebra/homework/equations/Equations.faq.question.1199848.html">https://www.algebra.com/algebra/homework/equations/Equations.faq.question.1199848.html</a>
<a href = "https://www.algebra.com/algebra/homework/Radicals/Radicals.faq.question.1151181.html">https://www.algebra.com/algebra/homework/Radicals/Radicals.faq.question.1151181.html</a>
As each link explains, there is likely a typo in your question. You'll need to ask your teacher for clarification. 
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