document.write( "Question 422394: I have a few I can't find examples for in my book...\r
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document.write( "1. x^4 < x^2\r
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document.write( "2. 2/x+8 > 3/x-9\r
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document.write( "3. x^3-5x^2-5x+25>0 \n" );
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Algebra.Com's Answer #294984 by ankor@dixie-net.com(22740)![]() ![]() You can put this solution on YOUR website! 1. x^4 < x^2 \n" ); document.write( "Divide both sides by x^2, results \n" ); document.write( "x^2 < 1 \n" ); document.write( ": \n" ); document.write( "2. \n" ); document.write( "Cross multiply \n" ); document.write( "2(x-9) > 3(x-9) \n" ); document.write( "2x - 18 > 3x - 27 \n" ); document.write( "3x - 3x > - 27 + 18 \n" ); document.write( "-x > - 9 \n" ); document.write( "x has to be positive, mult both sides by -1, this reverses the inequality sign \n" ); document.write( "x < 9 \n" ); document.write( ": \n" ); document.write( "3. x^3 - 5x^2 - 5x + 25 > 0 \n" ); document.write( "graph this \n" ); document.write( " \n" ); document.write( "you can see x > 0 -2.2 to +2.2; when x > 5 \n" ); document.write( " |