If two zeros of x3 + x2 – 5x – 5 are √5 and –√5 , then its third zero is
Given,
x3 + x2 – 5x – 5
Zeros = √5 and – √5
x2 – 5 is a root
(x2 – 5)(x + 1) = 0
x = – 1
So,
The third zero is – 1