Question

Check whether -3 and 3 are the zeroes of the polynomial x² – 9. 

Answer 1

Given polynomial p(x) = x² – 9 

Zero of the polynomial p(x) = 0 

x² – 9 = 0 

⇒ x² = 9 

⇒ x = √9 = ± 3 

∴ x = + 3, – 3 

∴ Zeroes of the polynomial p(x) are – 3 and 3.