因式分解;x的3次方减x的平方减10x减8

3个回答

x³-x²-10x-8
=x³-4x²+3x²-10x-8
=x²(x-4)+(x-4)(3x+2)
=(x-4)(x²+3x+2)
=(x-4)(x+1)(x+2)