document.write( "Question 50214: determine domain of :
\n" ); document.write( "y = square root of (x^2-16) \n" ); document.write( "

Algebra.Com's Answer #33354 by stanbon(75887) $\"\"$ $\"About$

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determine domain of :
\n" ); document.write( "y = square root of (x^2-16)
\n" ); document.write( "---------------
\n" ); document.write( "Since you want \"y\" to be a Real Number,
\n" ); document.write( "x^2-16 must be greater than or equal to zero.
\n" ); document.write( "x^2-16>=0
\n" ); document.write( "x^2>=16
\n" ); document.write( "x>=4 ; x<=-4
\n" ); document.write( "That is the domain.
\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
\n" ); document.write( " \n" ); document.write( "

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