Question

If two zeros of
${x}^{3}$
+
${x}^{2}$
– 5x - 5 are
$\sqrt{5}$
and
$- \sqrt{5}$
then its third zero is
(A)-1
(B)1
(C)2
(D) - 2​

Answer 1

option b is your answer

alpha =√5

beta=-√5

gama =?

alpha+beta+gama=-b/a

√5-√5+gama=1

gama=1

hope it helps