a very very hard question

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/07/16 20:51:10

a very very hard question
8x^3+1 （分解因式）

用立方和差公式：a^3+b^3=(a+b)(a^2-ab+b^2)
a^3-b^3=(a-b)(a^2+ab+b^2)得8x^3+1 =（2x+1)(4x^2-2x+1)

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