document.write( "Question 422280: How do you find the square root of a number? Also, how can you identify the square root as rational or irrational? \n" ); document.write( "

Algebra.Com's Answer #294757 by richard1234(7193) $\"\"$ $\"About$

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The square root is simply the number such that if you multiply it by itself, you get the original number. For example, $\"sqrt%289%29+=+3\"$ . Many square roots come from memorization, others you'll need a calculator or you can use differential methods.\r
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\n" ); document.write( "\n" ); document.write( "Identifying whether square roots are (ir)rational takes some practice. For integers, if you can easily recognize that the number is a perfect square, say 529, then you can conclude that $\"sqrt%28529%29\"$ is rational. Decimals are even trickier, as it might take memorization to conclude that $\"sqrt%2815.21%29\"$ is rational. \n" ); document.write( "

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