Question

Find the value of the polynomial x2 + 2x + + 5,
when x=-1.​

Answer 1

Answer:

${x}^{2} + 2x + 5$

$= {-1}^{2} + 2 \times - 1 + 5$

$= 1 - 2 + 5$

[tex] = 4

Answer 2

Given,

The given polynomial$\[ = {x^2} + 2x + 5\]$

Solution,

Know that in order to calculate the value at a given point apply the value of the point in the given equation.

Therefore,

$\[\begin{array}{l} = {\left( { - 1} \right)^2} + 2\left( { - 1} \right) + 5\\ = 1 - 2 + 5\\ = 6 - 2\\ = 4\end{array}\]$

Hence, the value of the polynomial is $\[4.\]$