Jasoncookies23 Jasoncookies23

22-09-2020
Mathematics

contestada

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)

Respuesta :

jimrgrant1 jimrgrant1

22-09-2020

Answer:

(x² - 3)(x² + 3)

Step-by-step explanation:

[tex]x^{4}[/tex] - 9 ← is a difference of squares and factors in general as

a² - b² = (a - b)(a + b) , thus

[tex]x^{4}[/tex] - 9

= (x² )² - 3²

= (x² - 3)(x² + 3)

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