document.write( "Question 992342: Determine the values of the variable for which the expression is defined as a real number. (Enter your answer using interval notation.)\r
\n" ); document.write( "\n" ); document.write( "square root of x^2 − 16\r
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\n" ); document.write( "\n" ); document.write( "I squared the entire thing, so that took care of the square root. Then I factored it into (x-4) (x+4) but thats as far as I got...
\n" ); document.write( "help, please? :(
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Algebra.Com's Answer #611956 by ikleyn(52781)\"\" \"About 
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\n" ); document.write( "Many similar examples are considered in the lesson  Domain of a function which involves a quadratic polynomial under the square root operator  in this site.\r
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