algebra sum help me!?

Factorise:

formula:a^2 - b^2 = (a+b)(a-b)

x^4+4

2007-08-06 03:02:20 · 2 answers · asked by Niranjana S 2 in Science & Mathematics ➔ Mathematics

x^4 + 4 cannot be further fatorised unless it is x^4 - 4.

2007-08-06 03:30:21 · answer #1 · answered by Anonymous · 0⤊ 0⤋

x^4 + 4 = (x^2)^2 + 2^2 = (x^2 + 2)(x^2 - 2)

2007-08-06 10:28:39 · answer #2 · answered by Captain Mephisto 7 · 0⤊ 0⤋

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