Question

Dado o polinômio p(x) = 2x2 - 15x + 3. para x = 9 ou p9 obteremos: A) 30 C) 132 D) 81​

Answer 1

✅ Tendo finalizado os cálculos, concluímos que o valor numérico do referido poinômio para x = 9 é:

              $\Large\displaystyle\text{ \begin{gathered}\boxed{\boxed{\:\:\:\bf P(9) = 30\:\:\:}}\end{gathered} }$

Portanto, a opção correta é:

        $\Large\displaystyle\text{ \begin{gathered}\boxed{\boxed{\:\:\:\bf Aalternativa\:A\:\:\:}}\end{gathered} }$

Seja o polinômio:

        $\Large\displaystyle\begin{gathered} P(x) = 2x^{2} - 15x + 3\end{gathered}$

Se:

                      $\Large\displaystyle\begin{gathered} x = 9\end{gathered}$

Então, temos:

        $\Large\displaystyle\begin{gathered} P(9) = 2\cdot9^{2} - 15\cdot9 + 3\end{gathered}$

                    $\Large\displaystyle\begin{gathered} = 2\cdot81 - 135 + 3\end{gathered}$

                    $\Large\displaystyle\begin{gathered} = 162 - 135 + 3\end{gathered}$

                    $\Large\displaystyle\begin{gathered} = 30\end{gathered}$

✅ Portanto, o valor numérico é:

        $\Large\displaystyle\begin{gathered} P(9) = 30\end{gathered}$

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