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1 vote
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)

User Visual
by
7.6k points

1 Answer

1 vote

Answer:

(x² - 3)(x² + 3)

Explanation:


x^(4) - 9 ← is a difference of squares and factors in general as

a² - b² = (a - b)(a + b) , thus


x^(4) - 9

= (x² )² - 3²

= (x² - 3)(x² + 3)

User Paul Hristea
by
9.0k points

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