document.write( "Question 263516: cant seem to figure this one out :/\r
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Algebra.Com's Answer #194200 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! x/2 > x/(x+4) + 4 \n" ); document.write( "--- \n" ); document.write( "Solve the equality: \n" ); document.write( "(x/2) = x/(x+4) + 4 \n" ); document.write( "Multiply thru by 2(x+4) to get: \n" ); document.write( "x(x+4) = 2x + 8(x+4) \n" ); document.write( "x^2+4x = 2x + 8x + 32 \n" ); document.write( "x^2 -6x - 32 = 0 \n" ); document.write( "x = [6 +- sqrt(36 -4*-32)]/2 \n" ); document.write( "x = [6 +- sqrt(164)]/2 \n" ); document.write( "x = 9.403 or x = -3.403 \n" ); document.write( "--- \n" ); document.write( "These cannot be in the solution of the inequality. \n" ); document.write( "x = -4 can also not be a solution. \n" ); document.write( "-------------------------- \n" ); document.write( "Draw a number line and plot -4, -3.403 and 9.403 \n" ); document.write( "That breaks the number line into four intervals that \n" ); document.write( "may or may not contain solutions for the INEQUALITY. \n" ); document.write( "------------------------ \n" ); document.write( "Test a value from each interval in x/2 > x/(x+4) + 4 \n" ); document.write( "Test x = -5: -5/2 > -5/-1 + 4 ; false \n" ); document.write( "Test x = 1: 1/2 > 1/5 + 4 ; false \n" ); document.write( "Test x = 10: 5 > (10/14) + 4 : true \n" ); document.write( "========================================== \n" ); document.write( "Solution: x> 9.403 \n" ); document.write( "========================================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |