Question

O valor numérico do polinômio: P (x) = x² - 2x + 12, quando x = 3 é:

A) 0

B) 10

C) 15

D) 20​

Answer 1

$\begin{bmatrix}P=x^2-2x+12\\ x=3\end{bmatrix}\\\\\begin{bmatrix}x=3\end{bmatrix}\\\\P=3^2-2\cdot \:3+12\\\\P=15\\\\x=3,\:P=15$

C) 15