Question 362468
Can't tell.
{{{f(-2)=-5}}}
{{{f(3)=-100}}}
No change in sign so you don't know.
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{{{drawing(300,300,-5,5,-5,5,grid(1),blue(line(-2,10,-2,-10)),blue(line(3,10,3,-10)),graph(300,300,-5,5,-5,5,-2x^3-5x^2-1))}}}
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Once you graph it, you can say that it doesn't.