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IBPS RRB Officer Prelims 09 Sep 2017 Shift 2 Paper
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© examsnet.com
Question : 52
Total: 80
I
.
4
x
2
+
5
x
+
1
=
0
I
I
.
2
y
2
+
7
y
+
6
=
0
if x > y
if x
>
y
if x < y
if x
<
y
if x = y orthe relationship between x and ycannot be established.
Validate
Solution:
(1)
I
.
4
x
2
+
5
x
+
1
=
0
⇒
4
x
2
+
4
x
+
x
+
1
=
0
⇒
4
x
(
x
+
1
)
+
1
(
x
+
1
)
=
0
⇒
(
x
+
1
)
(
4
x
+
1
)
=
0
⇒
x
=
–
1
o
r
,
–
1
4
I
I
.
2
y
2
+
7
y
+
6
=
0
⇒
2
y
2
+
4
y
+
3
y
+
6
=
0
⇒
2
y
(
y
+
2
)
+
3
(
y
+
2
)
=
0
⇒
(
y
+
2
)
(
2
y
+
3
)
=
0
⇒
y
=
–
2
o
r
,
–
3
2
Clearly, x > y
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