x^3-9x+8

问题描述:

x^3-9x+8

x^3-9x+8
=x³-x²+x²-9x+8
=x²(x-1)+(x-1)(x-8)
=(x-1)(x²+x-8)

x^3-9x+8
=x³-x²+x²-9x+8
=x²(x-1)+(x²-9x+8)
=x²(x-1)+(x-1)(x-8)
=(x-1)(x²+x-8)

这是什么啊 没说清楚啊

是X的三次方吗 这是要因式分解吗

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

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