document.write( "Question 614317: Hello! And thank you for helping me with this question! \r
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document.write( "Question:
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document.write( "Find a solution to the inequality: x(7 -x)> 8\r
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document.write( "I tried distributing the x outside of the parenthesis to the 7 and -x in the parenthesis, but then I got stuck. Could you please help me solve this? Thank you! \n" );
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Algebra.Com's Answer #386488 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! Find a solution to the inequality: x(7 -x)> 8 \n" ); document.write( "----- \n" ); document.write( "7x - x^2 > 8 \n" ); document.write( "---- \n" ); document.write( "x^2-7x+8 < 0 \n" ); document.write( "------ \n" ); document.write( "Factor: \n" ); document.write( "(x-8)(x+1) < 0 \n" ); document.write( "------ \n" ); document.write( "Draw a number line: \n" ); document.write( "Plot the points x = -1 and x = 8 \n" ); document.write( "---- \n" ); document.write( "Test a value from each of the 3 intervals to see where \n" ); document.write( "the solutions are for the inequality. \n" ); document.write( "Let x = -10 ; you get -*- < 0 ; false \n" ); document.write( "---- \n" ); document.write( "Let x = 0 ; you get -*+ < 0 ; true. So solutions in -1< x < 8 \n" ); document.write( "---- \n" ); document.write( "Let x = 10 ; you get +*+ < 0 ; false. \n" ); document.write( "---- \n" ); document.write( "Solutions are in the interval (-1,8) \n" ); document.write( "============================================ \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |