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)

in progress 0
Hồng Cúc 3 years 2021-08-06T13:52:10+00:00 1 Answers 7 views 0

Answers ( )

    0
    2021-08-06T13:53:47+00:00

    Answer:

    (x² – 3)(x² + 3)

    Step-by-step 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)

Leave an answer

Browse

Giải phương trình 1 ẩn: x + 2 - 2(x + 1) = -x . Hỏi x = ? ( )