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Haryana Police Constable Model Paper 9
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© examsnet.com
Question : 10
Total: 100
137
×
137
+
137
×
133
+
133
×
133
137
×
137
×
137
−
133
×
133
×
133
is equal to
4
270
1
4
1
270
Validate
Solution:
Let
137
be
x
&
133
be
y
∴
137
×
137
+
137
×
133
+
133
×
133
137
×
137
×
137
−
133
×
133
×
133
=
a
×
a
+
a
×
b
+
b
×
b
a
×
a
×
a
−
b
×
b
×
b
=
a
2
+
ab
+
b
2
a
3
−
b
3
=
a
2
+
ab
+
b
2
(
a
−
b
)
(
a
2
+
ab
+
b
2
)
=
1
a
−
b
=
1
137
−
133
=
1
4
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