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Standard XI
Mathematics
NCERT
Question
Expand
(
1
−
2
x
)
5
Open in App
Solution
Verified by Toppr
Using Binomial Theorem, the expression
(
1
−
2
x
)
5
can be expanded as
(
1
−
2
x
)
5
=
5
C
0
(
1
)
5
−
5
C
1
(
1
)
4
(
2
x
)
+
5
C
2
(
1
)
3
(
2
x
)
2
−
5
C
3
(
1
)
2
(
2
x
)
3
+
5
C
4
(
1
)
1
(
2
x
)
4
−
5
C
5
(
2
x
)
5
=
1
−
5
(
2
x
)
+
10
(
4
x
2
)
−
10
(
8
x
3
)
+
5
(
16
x
4
)
−
(
32
x
5
)
=
1
−
10
x
+
40
x
2
−
80
x
3
+
80
x
4
−
32
x
5
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