Factorise 16x^7-81
please tell
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Answer:
cannot factor
Step-by-step explanation:
Answered by
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Step-by-step explanation:
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Algebra Examples
Popular Problems Algebra Factor 16x^4-81
16
x
4
−
81
Rewrite
16
x
4
as
(
4
x
2
)
2
.
(
4
x
2
)
2
−
81
Rewrite
81
as
9
2
.
(
4
x
2
)
2
−
9
2
Since both terms are perfect squares, factor using the difference of squares formula,
a
2
−
b
2
=
(
a
+
b
)
(
a
−
b
)
where
a
=
4
x
2
and
b
=
9
.
(
4
x
2
+
9
)
(
4
x
2
−
9
)
Simplify.
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(
4
x
2
+
9
)
(
2
x
+
3
)
(
2
x
−
3
)
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