Разложение на множители
[src]
/ ___\ / ___\
| 3 I*\/ 7 | | 3 I*\/ 7 |
1*(x + 3)*|x + - + -------|*|x + - - -------|
\ 4 4 / \ 4 4 /
$$1 \left(x + 3\right) \left(x + \left(\frac{3}{4} + \frac{\sqrt{7} i}{4}\right)\right) \left(x + \left(\frac{3}{4} - \frac{\sqrt{7} i}{4}\right)\right)$$
((1*(x + 3))*(x + (3/4 + i*sqrt(7)/4)))*(x + (3/4 - i*sqrt(7)/4))
Подстановка условия
[src]
2*x^3 + 9*x^2 + 11*x + 6 при x = -3
$$2 x^{3} + 9 x^{2} + 11 x + 6$$
$$2 x^{3} + 9 x^{2} + 11 x + 6$$
$$x = -3$$
3 2
6 + 2*(-3) + 9*(-3) + 11*(-3)
$$2 (-3)^{3} + 9 (-3)^{2} + 11 (-3) + 6$$
$$0$$