把2x³-5x²+1因式分解

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把2x³-5x²+1因式分解把2x³-5x²+1因式分解把2x³-5x²+1因式分解原式=2x³-4x²-2x-x

把2x³-5x²+1因式分解
把2x³-5x²+1因式分解

把2x³-5x²+1因式分解
原式=2x³-4x²-2x-x²+2x+1
=2x(x²-2x-1)-(x²-2x-1)
=(2x-1)(x²-2x-1)

(2x-1)(x²-2x-1)