數學-因式分解

2015-07-21 1:12 pm
將下列式子因式分解
x⁴-x³+2x-x+1

回答 (2)

2015-07-21 1:53 pm
✔ 最佳答案
改為
將下列式子因式分解
x^4-x^3+2x^2-x+1
=(x^4+2x^2+1)-(x^3+x)
=(x^2+1)^2-x(x^2+1)
=(x^2-x+1)(x^2+1)


2015-07-21 3:14 pm
也可以這麼分解:
x^4-x^3+2x^2-x+1
= (x^4-x^3+x^2) + (x^2-x+1)
= x^2(x^2-x+1) + (x^2-x+1)
= (x^2-x+1)(x^2+1)


收錄日期: 2021-05-02 10:39:50
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