\[\boxed{\mathbf{397}.}\]
\[1)\ P(x) = x^{4} + 4x^{3} - 25x^{2} -\]
\[- 16x + 84\]
\[Делители:\ \pm 1;\ \pm 2;\ \pm 3;\ \pm 4;\]
\[\ldots;\ \pm 84.\]
\[P(2) = 0;\ \ x = 2 - корень.\]
\[1\] | \[4\] | \[- 25\] | \[- 16\] | \[84\] | |
---|---|---|---|---|---|
\[2\] | \[1\] | \[6\] | \[- 13\] | \[- 42\] | \[0\] |
\[3\] | \[1\] | \[9\] | \[14\] | \[0\] | |
\[- 2\] | \[1\] | \[7\] | \[0\] |
\[P(x) = (x - 2)(x - 3)(x + 2)(x - 7) = 0.\]
\[Ответ:x = \pm 2;3;7.\]
\[2)\ P(x) = x^{5} - 2x^{4} + 3x^{3} -\]
\[- 10x^{2} - 40x + 48\]
\[Делители:\ \pm 1;\ \pm 2;\ \pm 3;\ldots; \pm 48.\]
\[P(1) = 0;\ \ x = 1 - корень.\]
\[1\] | \[- 2\] | \[3\] | \[- 10\] | \[- 40\] | \[48\] | |
---|---|---|---|---|---|---|
\[1\] | \[1\] | \[- 1\] | \[2\] | \[- 8\] | \[- 48\] | \[0\] |
\[- 2\] | \[1\] | \[- 3\] | \[8\] | \[- 24\] | \[0\] | |
\[3\] | \[1\] | \[0\] | \[8\] |
\[P(x) = (x - 1)(x + 2)(x - 3)\underset{\neq 0}{\overset{\left( x^{2} + 8 \right)}{︸}} = 0.\]
\[Ответ:x = - 2;\ \ 1;\ \ 3.\]