### Question Description

P(x) = x^{4} − 3x^{3} + 27x − 81

*x*=

## Final Answer

*P(x) = x^4 − 3x^3 + 27x − 81*

*x^4 − 3x^3 + 27x − 81 = 0*

*x^3(x - 3) + 27(x - 3) = 0*

*(x^3 + 27)(x - 3) = 0*

*(x + 3)(x^2 + 3x + 9)(x - 3) = 0*

*x = - 3 x = 3 x^2 + 3x = - 9*

* x(x + 3) = - 9*

* x = - 9 x = - 12*

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