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Algebra
Question

5. If $$x = - 1$$ is a root of the polynomial $$0 = x ^ { 3 } + 4 x ^ { 2 } + 2 x - 1$$ , what are the remaining roots?

$$x = \pm 1$$

$$x = - 3.5 , x = - 2.5$$

$$x = \frac { - 3 \pm \sqrt { 13 } } { 2 }$$

$$x = \pm 3$$

$$x = \frac { - 3 \pm \sqrt { 13 } } { 2 }$$