MathematicsThe value of the polynomial p(x)=x2−2x+3 at x=−1 is

The value of the polynomial $p (x) = x^{2} - 2 x + 3$ at $x = - 1$ is

A
2
B
3
C
6
D
None of these

Solution:

The value of polynomial

$\begin{array}{l} p (x) = x^{2} - 2 x + 3 at x = - 1 \\ p (- 1) = {(- 1)}^{2} - 2 (- 1) + 3 \\ p (1) = 1 + 2 + 3 = 3 + 3 = 6 \\ p (- 1) = 6 \end{array}$

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