document.write( "Question 211168: What is the domain of (x-5)/(x^2+5x+6) \n" ); document.write( "
Algebra.Com's Answer #159517 by nerdybill(7384) You can put this solution on YOUR website! Domain specifies the values of 'x' can take. \n" ); document.write( "In this case, you just want to make sure the denominator does NOT equal zero. \n" ); document.write( ". \n" ); document.write( "0 = (x^2+5x+6) \n" ); document.write( "0 = (x+2)(x+3) \n" ); document.write( "x = {-2,-3} \n" ); document.write( ". \n" ); document.write( "Therefore, the domain is \n" ); document.write( "all real numbers except -2 and -3. \n" ); document.write( ". \n" ); document.write( "Or, you can write as: \n" ); document.write( "(-oo, -3) U (-2, -3) U (-3, +oo) \n" ); document.write( "where oo is the infinity symbol \n" ); document.write( " \n" ); document.write( " |