document.write( "Question 796222: what is the square root of 20 \n" ); document.write( "

Algebra.Com's Answer #481290 by KMST(5328) $\"\"$ $\"About$

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The square root of 20, $\"sqrt%2820%29\"$ , can be \"simplified\", or approximated.
\n" ); document.write( "It's an irrational number, meaning that there is no fraction or decimal number exactly equal to it.
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\n" ); document.write( "Simplifying:
\n" ); document.write( " $\"sqrt%2820%29=sqrt%284%2A5%29=sqrt%284%29%2Asqrt%285%29=2sqrt%285%29\"$
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\n" ); document.write( "Approximating:
\n" ); document.write( "One of my calculators says that $\"sqrt%2820%29\"$ is 4.4721359, and another one says 4.472135955, but those are just approximations. \r
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\n" ); document.write( "\n" ); document.write( "NOTE: You can write \"square root of 20\" as \"sqrt(20)\" here, just as you can write 3^2 for $\"3%5E2\"$ and x^4 for $\"x%5E4\"$ . \n" ); document.write( "

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