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IBPS Clerk Prelims Model Paper 18
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© examsnet.com
Question : 59
Total: 100
Expand and simplify
(
x
+
5
)
2
+
(
x
–
3
)
2
:
2(
x
2
+ 2x — 17)
2(
x
2
— 2x + 17)
2(
x
2
— 2x — 17)
2(
x
2
+ 2x + 17)
None of these
Validate
Solution:
The expression,
(
x
+
5
)
2
+
(
x
—
3
)
2
= (
x
2
+ 25 + 10x) + (
x
2
+ 9 — 6x)
=
x
2
+ 25 + 10x +
x
2
+ 9 — 6x
=
2
x
2
+ 34 + 4x
=
2
x
2
+ 4x + 34
= 2 (
x
2
+ 2x + 17).
© examsnet.com
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