把2x³-5x²+1因式分解
问题描述:
把2x³-5x²+1因式分解
答
(2x-1)(x²-2x-1)
答
原式=2x³-4x²-2x-x²+2x+1
=2x(x²-2x-1)-(x²-2x-1)
=(2x-1)(x²-2x-1)