Question 348753
{{{x^3+x^2-20x<0}}}
{{{x(x+5)(x-4)<0}}}
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{{{drawing(300,300,-8,8,-50,50,green(line(-5,100,-5,-100)),green(line(4,100,4,-100)),grid(1),graph(300,300,-8,8,-50,50,x*(x+5)*(x-4)))}}}
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Look for regions where the function is below the x-axis.
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Solution region:({{{-infinity}}},{{{-5}}}) U ({{{0}}},{{{4}}})