0 -3x^2-4x+3 < 0' alt='f(x) = -x^3-2x^2+3x+1 f'(x) = -3x^2-4x+3 -3x^2-4x+3 = 0 D = 16+4*9 = 52 x_1 = -\frac{4+\sqrt{52}}{6} = -\frac{2+\sqrt{13}}{3} < 0 x_2 = -\frac{4-\sqrt{52}}{6} = -\frac{2-\sqrt{13}}{3} > 0 -3x^2-4x+3 < 0' align='absmiddle' class='latex-formula'>
0 -3x^2-4x+3 < 0' alt='f(x) = -x^3-2x^2+3x+1 f'(x) = -3x^2-4x+3 -3x^2-4x+3 = 0 D = 16+4*9 = 52 x_1 = -\frac{4+\sqrt{52}}{6} = -\frac{2+\sqrt{13}}{3} < 0 x_2 = -\frac{4-\sqrt{52}}{6} = -\frac{2-\sqrt{13}}{3} > 0 -3x^2-4x+3 < 0' align='absmiddle' class='latex-formula'>