Question

P(x)=x2-1;x=-2 find wheter the following zeroes of the pollynomials are indicated towsrds them​

Answer 1

Given:

The polynomial is:

$p(x)=x^2-1$

To find:

Whether $x=-2$ is a zero of the given polynomial or not.

Solution:

If $x=c$ is a zero of a polynomial, then $f(c)=0$.

We have,

$p(x)=x^2-1$

Putting $x=-2$ in the given polynomial.

$p(-2)=(-2)^2-1$

$p(-2)=4-1$

$p(-2)=3$

Since $p(-2)\neq 0$, therefore $x=-2$ is not a zero of the given polynomial.