因式分解x^3-9x+8

2025-12-14 12:46:52
推荐回答(1个)
回答1:

x^3-9x+8
=(x^3-x)-(8x-8)
=x(x^2-1)-8(x-1)
=x(x+1)(x-1)-8(x-1)
=(x-1)(x^2+x-8)