Question

If √5 and – √5 are two zeroes of the polynomial x³ + 3x² – 5x – 15, then its third zero is

A. 3

B. – 3

C. 5

D. – 5

Answer 1

Given,

x ³ + 3x² – 5x – 15

Zeros = √5 and – √5

So the third zero = – 3