x대减9x+8因式分解

2025-06-27 15:21:46
推荐回答(1个)
回答1:

x³减9x+8因式分解

x³-9x+8
=x³-x-8x+8
=x(x²-1)-8(x-1)
=x(x+1)(x-1)-8(x-1)
=(x-1)(x²+x-8)