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Mathematics
Mathematics
Problem
If the difference between the roots of the equation
x
2
+
a
x
+
1
=
0
x^2 + ax + 1 = 0
x
2
+
a
x
+
1
=
0
is less than
5
\sqrt{5}
5
, the set of possible values of
a
a
a
, is a.
(
−
3
,
3
)
(-3, 3)
(
−
3
,
3
)
b.
(
−
3
,
∞
)
(-3, \infty)
(
−
3
,
∞
)
c.
(
3
,
∞
)
(3, \infty)
(
3
,
∞
)
d.
(
−
∞
,
−
3
)
(- \infty, -3)
(
−
∞
,
−
3
)
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