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Byju's Answer
Standard VIII
Mathematics
Multiplication of Any Polynomial
Find the foll...
Question
Find the following product:
(
x
2
−
1
)
(
x
4
+
x
2
+
1
)
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Solution
Identitity to be used :
(
a
3
−
b
3
)
=
(
a
−
b
)
(
a
2
+
a
b
+
b
2
)
Consider given product
(
x
2
−
1
)
(
x
4
+
x
2
+
1
)
=
(
x
2
−
1
)
(
(
x
2
)
2
+
x
2
(
1
)
+
1
2
)
=
(
(
x
2
)
3
−
1
3
)
=
x
6
−
1
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2
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Q.
The product
(
x
2
−
1
)
(
x
4
+
x
2
+
1
)
is equal to
Q.
The product (x
2
ā1) (x
4
+ x
2
+ 1) is equal to
(a) x
8
ā 1
(b) x
8
+ 1
(c) x
6
ā 1
(d) x
6
+ 1