# 搞乜咁科學 #6 - 對戰 Battle ⚔️

An episode of [搞乜咁科學 GMG Science](https://invisiblenetwork.ai/podcast/1609526652), 5 Aug 2022, 57 min.

Audio: https://www.buzzsprout.com/1888276/episodes/11084077-6-battle.mp3

歡迎嚟到 搞乜咁科學 GMG Science 第6集！ 今集嘅主題係對戰 Battle！⚔️ 今集Keith會講以前啲數學家係點樣死過嘅呢？🧮 Abellona會講細菌同病毒嘅大作戰🔫 喂！好奇心，係時候醒喇 :) Social Media: 搞乜咁科學 IG: www.instagram.com/gmgscience 搞乜咁科學 YouTube: https://www.youtube.com/channel/UCFj2cwjDASS2SyYsj3pkNSQ Abellona IG: www.instagram.com/_doctor_u Keith IG: www.instagram.com/keith.poonsir Keith YouTube: https://www.youtube.com/channel/UC9fh5paH2jh5kfBVDEPC1YA Show Notes and Links: 大部份今集有關嘅圖片會係我哋IG見到㗎: www.instagram.com/gmgscience Abellona part 噬菌體 - Phage 紅女王猜想 - Red Queen Hypothesis 限制修飾系統 - Restriction-modification System 常間回文重複序列叢集系統 - CRISPR-Cas9 Further reading: Bacteriophage resistance mechanisms Alternative functions of CRISPR–Cas systems in the evolutionary arms race Keith part 配方法 - Completing the square 三次方程 - Cubic equation 費羅 - Scipione del Ferro 塔爾塔利亞 - Niccolò Fontana Tartaglia 卡爾達諾 - Cardano 數學大典 - Ars Magna 五次方或以上的多項式方程式沒有解答公式?! Further reading: The Secret Formula: How a Mathematical Duel Inflamed Renaissance Italy and Uncovered the Cubic Equation by Fabio Toscano How Imaginary Numbers Were Invented by Veritasium

## Transcript

[1:07] SPEAKER_01: I'm not going to be able to do that.
[25:00] unknown: If you have a few times, you can see that we can see the same thing.
[28:42] SPEAKER_02: So you can form completing the square.
[29:16] SPEAKER_02: But it's a good thing.
[43:17] SPEAKER_02: When the cubes with the things together are set equal to some discrete number, find other two that bias differ.
[43:26] SPEAKER_02: You will get into the habit of making the product always equal to the third of the things cubic exactly.
[43:34] SPEAKER_02: The result then of the cubic which properly subtracted will be equal to a principal thing.
[44:00] SPEAKER_00: Mm-hmm.
[44:04] SPEAKER_02: Come see that or it's out.
[44:05] SPEAKER_02: So I got you got a Zoo cool.
[44:10] SPEAKER_02: Kayee Dano.
[44:12] SPEAKER_02: Come Catano, eh?
[44:16] SPEAKER_02: Cook.
[44:21] SPEAKER_02: Korea San Soga.
[44:28] SPEAKER_02: Yan Hoka.
[44:31] SPEAKER_02: Tin Monhoka.
[44:32] SPEAKER_02: Tin Jan Hoka.
[44:34] SPEAKER_02: Yam.
[44:36] SPEAKER_02: Mosa.
[44:38] SPEAKER_02: Gaimunse.
[44:43] SPEAKER_02: So yeah, we'll see.
[45:26] SPEAKER_02: Yan Yao.
[45:27] SPEAKER_02: Come you see it die.
[45:35] SPEAKER_02: Yep, mm Sam Gaulin.
[45:38] SPEAKER_02: Sam you eat some tongue coi.
[45:40] SPEAKER_02: Hi, my line of day phone.
[45:42] SPEAKER_02: The review co.
[45:44] SPEAKER_01: So base of sea hus.
[45:59] SPEAKER_02: Some see tatalia see the mhoi and zido bayma.
[46:04] SPEAKER_02: Oh.
[46:05] SPEAKER_02: Come on, get okay.
[46:06] SPEAKER_02: Come on katano gay zaya within the gallery.
[46:10] SPEAKER_02: Come don't you could say like my tatalia the water building form file.
[46:14] SPEAKER_02: Come cut siwana.
[46:18] SPEAKER_02: Come katano, like some ge go mobile.
[46:36] SPEAKER_00: Mm-hmm.
[46:36] SPEAKER_02: Catano like you solve it to general equations.
[46:49] SPEAKER_02: So you can form general cubic equation.
[47:00] SPEAKER_02: Depressed cubic equation is formed and cube.
[47:15] SPEAKER_02: Substitute length reduced.
[47:19] SPEAKER_02: That's the depressed cubic equation.
[47:25] SPEAKER_02: So x scam b over sum a x cubed term or coefficient.
[47:31] SPEAKER_02: B x square term coefficient, c term coefficient, d a constant term.
[47:38] SPEAKER_02: So x substitution expands.
[48:00] SPEAKER_02: Depressed cubic equation.
[48:16] SPEAKER_02: So you can see that.
[48:56] SPEAKER_02: So we seen that go sick the soft depressed cube equation.
[49:28] SPEAKER_02: So yeah, I'm not sure.
[54:49] SPEAKER_02: Imaginary number.
[56:40] SPEAKER_01: Underscore underscore two.
[56:51] SPEAKER_02: I think so.

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