[中學] 請問這題數學如何解？

[flysaksak (夢)]

En. Safi feeds his cat 3 times a day. The first feeding time at 6:15 a.m. At what time should be feed his cat for the third feeding?

答案是h^2+12h+30
請問如何解？
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※ 編輯: flysaksak (111.83.48.120 臺灣), 04/16/2023 13:08:41
※ 編輯: flysaksak (111.83.48.120 臺灣), 04/16/2023 13:09:39
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