将4t²-3t+144化成顶点式
人气：198 ℃ 时间：2020-04-04 17:15:53
解答
4t²-3t+144
=4（t²-3/4t）+144
=4（t²-2*3/8t+9/64-9/64）+144
=4（t²-2*3/8t+9/64）-9/16+144
=4（t-3/8）²+2295/16
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