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RRB Paramedical Staff Nurse Model Paper 10
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© examsnet.com
Question : 55
Total: 100
Find the value of ‘k’ such that the product of roots of equation
x
2
+
4
x
+
k
2
=
0
is 8.
±
2
√
2
±
2
√
5
±
2
√
7
±
2
√
11
Validate
Solution:
The given quadratic equation is,
x
2
−
4
x
+
k
2
=
0
Sum of roots is equal to
−
b
a
and product of roots is
c
a
c
a
=
8
k
2
1
=
8
k
2
=
8
k
=
±
2
√
2
Therefore, the value of 'K is
±
2
√
2
© examsnet.com
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