\[f(x) = x^{2}(2x - 3) - 12(3x - 2);\]
\[на\ отрезке\ \lbrack - 3;\ 6\rbrack.\]
\[f(x) = 2x^{3} - 3x^{2} - 36x + 24;\]
\[f^{'}(x) = 2 \bullet 3x^{2} - 3 \bullet 2x - 36 =\]
\[= 6x^{2} - 6x - 36.\]
\[Стационарные\ точки:\]
\[6x^{2} - 6x - 36 = 0\]
\[x^{2} - x - 6 = 0\]
\[D = 1 + 24 = 25\]
\[x_{1} = \frac{1 - 5}{2} = - 2;\]
\[x_{2} = \frac{1 + 5}{2} = 3.\]
\[f( - 3) = - 54 - 27 + 108 + 24 = 51;\]
\[f( - 2) = - 16 - 12 + 72 + 24 = 68;\]
\[f(3) = 54 - 27 - 108 + 24 = - 57;\]
\[f(6) = 432 - 108 - 216 + 24 = 132.\]
\[Ответ:\ - 57;\ 132.\]