代数式3x2-4x+6的值为9,则x2-3分之4x+6的值为
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![代数式3x2-4x+6的值为9,则x2-3分之4x+6的值为](/uploads/image/z/5176987-43-7.jpg?t=%E4%BB%A3%E6%95%B0%E5%BC%8F3x2-4x%2B6%E7%9A%84%E5%80%BC%E4%B8%BA9%2C%E5%88%99x2-3%E5%88%86%E4%B9%8B4x%2B6%E7%9A%84%E5%80%BC%E4%B8%BA)
代数式3x2-4x+6的值为9,则x2-3分之4x+6的值为
代数式3x2-4x+6的值为9,则x2-3分之4x+6的值为
代数式3x2-4x+6的值为9,则x2-3分之4x+6的值为
3x^2-4x+6=9
x^2-4x/3+6
=(1/3)(3x^2-4x+18)
=(1/3)[(3x^2-4x+6)+12]
=(1/3)(9+12)
=21/3
=7