Solve
Guides
Join / Login
Use app
Login
0
You visited us
0
times! Enjoying our articles?
Unlock Full Access!
Standard VIII
Mathematics
Algebraic Identities
Question
Expand
(
3
a
−
2
b
)
2
using appropriate identity
Open in App
Solution
Verified by Toppr
Using the identity is
(
x
−
y
)
2
=
x
2
+
y
2
−
2
x
y
.
Given:
(
3
a
−
2
b
)
2
we apply the above identity by taking
x
=
3
a
and
y
=
−
2
b
We get,
(
3
a
−
2
b
)
2
=
(
3
a
)
2
+
(
2
b
)
2
−
(
2
×
3
a
×
2
b
)
=
9
a
2
+
4
b
2
−
12
a
b
Hence,
(
3
a
−
2
b
)
2
=
9
a
2
−
12
a
b
+
4
b
2
.
Was this answer helpful?
8
Similar Questions
Q1
Expand
(
3
a
−
2
b
)
2
using appropriate identity
View Solution
Q2
Expand
(
2
a
+
3
)
2
using appropriate identity
View Solution
Q3
Expand
(
a
+
5
)
2
using appropriate identity
View Solution
Q4
Expand
(
√
10
x
−
√
5
y
)
2
using appropriate identity
View Solution
Q5
Expand
(
y
−
3
)
2
using appropriate identity.
View Solution