Question

find the sum of the zeros of the quadratic polynomial x ^ 2 - 9 ​

Answer 1

It's 0 because :

Sum of zeroes for $ax^2+bx+c=0$ is equal to $-\frac{b}{a}$.

In this question, b=0 and a=1.

∴0

Answer 2

The sum of the zeros of the quadratic polynomial $x^2-9$ is zero(0).

Step-by-step explanation:

The given quadratic polynomial is  $x^2-9$

$=x^2+0x-9$

Here, a = 1, b = 0 and c = - 9

To find, the sum of the zeros of the quadratic polynomial $x^2-9$ = ?

Let α and β are the zeros of the given quadratic polynomial.

The sum of the zeros of the quadratic polynomial,

α + β = $\dfrac{-b}{a}$

∴ The sum of the zeros of the quadratic polynomial $x^2-9$

$=\dfrac{-0}{1}$

= 0

Thus, the sum of the zeros of the quadratic polynomial $x^2-9$  is zero(0).