帮我看看怎么因式分解2x³-5x²+1
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/01 22:59:11
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帮我看看怎么因式分解2x³-5x²+1
帮我看看
怎么因式分解2x³-5x²+1
帮我看看怎么因式分解2x³-5x²+1
解析,
2x³-5x²+1
=2x³-x²-4x²+1
=2x³-x²-(4x²-1)
=x²(2x-1)-(2x+1)(2x-1)
=(2x-1)(x²-2x-1)
2x³-5x²+1=(x²-2x-1)(2x-1),,,,,
2x³-5x²+1=(x²-2x-1)(2x-1)
2x³-5x²+1
=2x³-x²-4x²+1
=2x³-x²-(4x²-1)
=x²(2x-1)-(2x+1)(2x-1)
=(2x-1)(x²-2x-1)