x³-4x²+x+6因式分解x的三次方减4x的二次方加x加6
问题描述:
x³-4x²+x+6因式分解
x的三次方减4x的二次方加x加6
答
x³-4x²+x+6
=x³-3x²-x²+x+6
=(x³-3x²)-(x²-x-6)
=x²(x-3)-(x-3)(x+2)
=(x-3)(x²-x-2)
=(x-3)(x-2)(x+1)