Question

are -3 and 3 zeroes of polynomial x2-9

Answer 1

yes both are the zeroes of polynomial x2-9 bcs if we put the value of x as -3then it stasify the polunomial and when we put x as 3 then also it stasify the polynomial

Answer 2

Hi !

To check whether the given no:s are zeros of a polynomial , just put the  value as x .

p(x) = x² - 9

x = -3
p(-3) = (-3)² - 9
         = 9 -9 =0

-3 is a zero of the polynomial.
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x = 3

p(3) = (3)² - 9 
       = 9 - 9 = 0

3 is a zero of p(x).
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-3 and 3 are zeros of the polynomial x² - 9