若3x^3-x=1,求9x^4+12x^3-3x^2-7x+2003的值,

学习 时间:2026-04-08 00:29:42 阅读:9414
若3x^3-x=1,求9x^4+12x^3-3x^2-7x+2003的值,

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纯真的棉花糖

单薄的钻石

2026-04-08 00:29:42

9x^4+12x^3-3x^2-7x+2003
=9x^4-3x^2+12x^3-7x+2003
=3x(3x^3-x)+12x^3-7x+2003
=3x+12x^3-7x+2003
=12x^3-4x+2003
=4(3x^3-x)+2003
=2007

最新回答共有2条回答

  • 烂漫的嚓茶
    回复
    2026-04-08 00:29:42

    9x^4+12x^3-3x^2-7x+2003=9x^4-3x^2+12x^3-7x+2003=3x(3x^3-x)+12x^3-7x+2003=3x+12x^3-7x+2003=12x^3-4x+2003=4(3x^3-x)+2003=2007

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