Check whether-3 and 3 are the zeroesof the polynomial x²-9​

first we will take -3 as X and put the value in the polynomial we get (-3)²-9

=9-9

=0

and then we will take for 3 as x value and put into the polynomial then we get

=(3)²-9

=9-9

=0

then we can say that - 3 and 3 are the zeros of polynomial x² - 9