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Byju's Answer
Standard VIII
Mathematics
Multiplication of Any Polynomial
Use suitable ...
Question
Use suitable identities to find the following products:
(
2
x
+
7
)
(
3
x
−
5
)
Open in App
Solution
We have,
(
2
x
+
7
)
(
3
x
+
5
)
=
2
(
x
+
7
2
)
.
3
(
x
−
5
3
)
=
6
(
x
+
7
2
)
(
x
−
5
3
)
=
6
[
x
2
+
(
7
2
−
5
3
)
x
+
7
2
×
−
5
3
]
[
∵
(
x
+
a
)
(
x
+
b
)
=
x
2
+
(
a
+
b
)
x
+
a
b
]
=
6
[
x
2
+
(
21
−
10
6
)
x
−
35
6
]
=
6
x
2
+
11
x
−
35
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