1. The problem statement, all variables and given/known data [tex]x^3 + 3x^2 - 16x - 48 <= 0[/tex] factored it down to get this. [tex](x+3)(x^2 -16) <= 0[/tex] [tex]x + 3 <= 0[/tex] [tex]x <= -3[/tex] [tex]x^2 - 16 <= 0[/tex] [tex]x <= 4[/tex] [tex]x <= -4[/tex] But, that is not right, looking at a graph x needs to be greater than or equal to -3, not less than or equal to. But the other one is right. How come?