Write 4x⁴ – 13x² + 9 as the product of four linear factors.
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Answer:
Rewrite
x
4
as
(
x
2
)
2
.
4
(
x
2
)
2
−
13
x
2
+
9
=
0
Let
u
=
x
2
. Substitute
u
for all occurrences of
x
2
.
4
u
2
−
13
u
+
9
=
0
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