Question

Consider the quadratic function.

Answer 1

Answer:

N = -1

explanation:

x = N

solving steps:

$\sf f(x)=x^2+2x-15$

To find symmetry of a quadratic function.

                                                                   vertex formula    :   $\sf x=\dfrac{-b}{2a}$

$a=1,\:b=2$

$\sf x=\dfrac{-2}{2\cdot \:1}$

$\sf x = -1$

Then,

N = -1