y=3x눀-6x,求开口方向,顶点坐标,对称轴

2025-03-09 21:05:51
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回答1:

y=3x²-6x

=3(x²-2x+1-1)
=3(x²-2x+1)-3
=3(x-1)²-3
开口向上,顶点坐标为(1,-3),对称轴为 x=1