expand {3x+(-1/5)+2y}2
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Answered by
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Step-by-step explanation:
The formula of Binomial Theorem
(
a
+
b
)
n
=
(
n
0
)
a
n
b
0
+
(
n
1
)
a
n
−
1
b
1
+
(
n
2
)
a
n
−
2
b
2
+
...
+
(
n
n
−
1
)
a
1
b
n
−
1
+
(
n
n
)
a
0
b
n
Let
a
=
3
x
and
b
=
−
2
y
2
(
3
x
−
2
y
2
)
5
=
(
3
x
)
5
(
−
2
y
2
)
0
+
5
1
!
(
3
x
)
4
(
−
2
y
2
)
1
+
5
⋅
4
2
!
(
3
x
)
3
(
−
2
y
2
)
2
+
5
⋅
4
⋅
3
3
!
(
3
x
)
2
(
−
2
y
2
)
3
+
5
⋅
4
⋅
3
⋅
2
4
!
(
3
x
)
1
(
2
y
2
)
4
+
5
⋅
4
⋅
3
⋅
2
⋅
1
5
!
(
3
x
)
0
(
−
2
y
2
)
5
=
243
x
5
−
5
(
81
)
(
2
)
x
4
y
2
+
10
(
27
)
(
4
)
x
3
y
4
+
10
(
9
)
(
−
8
)
x
2
y
6
+
5
(
3
)
(
16
)
x
y
8
−
32
y
10
=
243
x
5
−
810
x
4
y
2
+
1080
x
3
y
4
−
720
x
2
y
6
+
240
x
y
8
−
32
y
10
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