how do you factor (x^4 - 1) ..........?
回答 (3)
2008-09-03 6:01 am
✔ 最佳答案
Its the difference of 2 squares(x^2 + 1)(x^2 - 1)
= (x^2 + 1)(x + 1)(x - 1)
2008-09-03 4:22 pm
(x² - 1) (x² + 1)
(x - 1) (x + 1) (x² + 1)
(x - 1) (x + 1) (x² + 1)
2008-09-03 3:35 pm
a^2 - b^2 = (a + b)(a - b)
x^4 - 1
= (x^2)^2 - (1^2)^2
= (x^2 + 1)(x^2 - 1)
= (x^2 + 1)(x + 1)(x - 1)
x^4 - 1
= (x^2)^2 - (1^2)^2
= (x^2 + 1)(x^2 - 1)
= (x^2 + 1)(x + 1)(x - 1)
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