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Factor. x^4-9 (x^2-3i) (x^2 + 3i) (x-3) (x+3) (x^2 -3) (x^2 + 3) (x^2 – 3) (x^2 -3)
Question
Factor.
x^4-9
(x^2-3i) (x^2 + 3i)
(x-3) (x+3)
(x^2 -3) (x^2 + 3)
(x^2 – 3) (x^2 -3)
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Mathematics
3 years
2021-08-06T13:52:10+00:00
2021-08-06T13:52:10+00:00 1 Answers
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Answers ( )
Answer:
(x² – 3)(x² + 3)
Step-by-step explanation:
– 9 ← is a difference of squares and factors in general as
a² – b² = (a – b)(a + b) , thus
– 9
= (x² )² – 3²
= (x² – 3)(x² + 3)