document.write( "Question 153822: For what values of x is the value of each expression a real number?
\n" ); document.write( "1. square root of x
\n" ); document.write( "2. 5-square root of x
\n" ); document.write( "3. square root of x+3
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Algebra.Com's Answer #113254 by orca(409)\"\" \"About 
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1)
\n" ); document.write( "For \"sqrt%28x%29\" to be a real number, x has to be greater or equal to 0.
\n" ); document.write( "2)
\n" ); document.write( "For \"5+-+sqrt%28x%29\" to be a real number, x has to be greater or equal to 0.
\n" ); document.write( "3)
\n" ); document.write( "For \"sqrt%28x%2B3%29\" to be a real number, x+3 has to be greater or equal to 0.
\n" ); document.write( "I.e., x+3 >=0
\n" ); document.write( "Solving the inequality for x, we have
\n" ); document.write( "x>=-3
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