document.write( "Question 125946: I don't know how to solve this inequalitie.: It gave me this information. y=x^2 , squareroot y= squareroot x^2, squareroot y=|x|
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document.write( "where therefore since x The question is |x-3|>|2x+1|\r
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document.write( "I asked this question before but is there another way to figure this out without graphing like can we actually solve it by doing the math? \n" );
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Algebra.Com's Answer #92297 by stanbon(75887)![]() ![]() ![]() You can put this solution on YOUR website! |x-3|>|2x+1| \n" ); document.write( "--------------- \n" ); document.write( "if x = 0, you get |-3|>|1|, which is true: so x=0 is part of the solution. \n" ); document.write( "-------------- \n" ); document.write( "If both x-3 and 2x+1 are positive you get: \n" ); document.write( "x-3 > 2x+1 \n" ); document.write( "x<-4 \n" ); document.write( "Testing x=-10 you get: \n" ); document.write( "|-13| > |-19| which is false. \n" ); document.write( "--------------------- \n" ); document.write( "If both x-3 and 2x+1 are negative you get: \n" ); document.write( "-x+3 > -2x-1 \n" ); document.write( "x > -4 \n" ); document.write( "Testing x=0 you know already this is true so x>-4 is part of the solution. \n" ); document.write( "-------------------- \n" ); document.write( "If x-3 is positive and 2x+1 is negative you get: \n" ); document.write( "x-3 > -2x-1 \n" ); document.write( "3x > 2 \n" ); document.write( "x>2/3 \n" ); document.write( "Testing x=1 you get: \n" ); document.write( "|1-3| > |2+1| which is false \n" ); document.write( "--------------------------------- \n" ); document.write( "If x-3 is negative and 2x+1 is positive you get: \n" ); document.write( "-x+3 > 2x+1 \n" ); document.write( "3x<2 \n" ); document.write( "x <2/3 \n" ); document.write( "Testing 0 you know already this is true so x < 2/3 \n" ); document.write( "----------------------- \n" ); document.write( "Putting that all together you get -4 < x < 2/3 \n" ); document.write( "================== \n" ); document.write( "PS: Graphing it is easier. \n" ); document.write( "================== \n" ); document.write( "Cheers, \n" ); document.write( "Stan H. \n" ); document.write( " |