..谢啦...f(x)=3x²-12x+5=3(x-2)²-7这是怎么变的啊...
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..谢啦...f(x)=3x²-12x+5=3(x-2)²-7这是怎么变的啊.....谢啦...f(x)=3x²-12x+5=3(x-2)²-7这是怎么变的啊.
..谢啦...f(x)=3x²-12x+5=3(x-2)²-7这是怎么变的啊...
..谢啦...f(x)=3x²-12x+5=3(x-2)²-7这是怎么变的啊...
..谢啦...f(x)=3x²-12x+5=3(x-2)²-7这是怎么变的啊...