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RBI Grade B Officers Aug 2014 Paper
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© examsiri.com
Question :
130 of 200
Marks:
+1
,
-0
I
.
9
x
2
+
3
x
–
2
=
0
I
I
.
8
y
2
+
6
y
+
1
=
0
if x < y
if x
<
y
if x = y or the relation cannotbe established
if x
>
y
if x > y
Validate
Solution:
(3)
I
.
9
x
2
+
3
x
–
2
=
0
⇒
9
x
2
+
6
x
–
3
x
–
2
=
0
⇒
3
x
(
3
x
+
2
)
–
1
(
3
x
+
2
)
=
0
⇒
(
3
x
+
2
)
(
3
x
–
1
)
=
0
⇒
x
=
−
2
3
or
1
3
I
I
.
8
y
2
+
6
y
+
1
=
0
⇒
8
y
2
+
4
y
+
2
y
+
1
=
0
⇒
4
y
(
2
y
+
1
)
+
1
(
2
y
+
1
)
=
0
⇒
(
2
y
+
1
)
(
4
y
+
1
)
=
0
⇒
y
=
−
1
2
or -
1
4
© examsiri.com
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