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Mathematics
Mathematics
Problem
Let
p
,
q
∈
{
1
,
2
,
3
,
4
}
p, q \in \{1, 2, 3, 4\}
p
,
q
∈
{
1
,
2
,
3
,
4
}
. Then number of equation of the form
p
x
2
+
q
x
+
1
=
0
px^2 + qx + 1 = 0
p
x
2
+
q
x
+
1
=
0
, having real roots, is (A) 15 (B) 9 (C) 7 (D) 8
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