future library.

Chapter 295 Formula
After two or three hundred years of development, the solution to cubic equations of one variable has become a completely mechanized procedure. No matter how stupid a student is, they can figure out the answer just by looking at the formula.

Who would have thought that 300 years ago, mathematicians would fight duels with one-dimensional cubic equations?
Cheng Jinzhou didn't understand what the three star warlocks were thinking, so he simply solved all the more than ten cubic equations with the fastest speed. It took less than 10 minutes in total, which was only slower than Kong Wei's speed of copying the questions.

Taiyu and Hui Minren looked at it for a while, and then they realized that the formula Cheng Jinzhou used to apply the result was applicable to all cubic equations.

This discovery made them both surprised and delighted, and at the same time, they were even more puzzled-whether it is really possible to have a formula that can solve all cubic equations, which seems to make many classic problems worthless.

Hui Minren couldn't help picking up the answer in his hand and checking it again, although he had already printed the above number in his mind.

No omissions!

In addition to Cheng Jinzhou's habit of listing the roots of negative numbers - in Daxia, people do not regard negative numbers as a number because they do not exist.

Hui Minren's originally firm thoughts seemed to be shaken.

In the past few days, he specially sent someone to Cheng's house to inquire about the news, and learned that Cheng Jinzhou had hardly had time to go out to study in the past ten years. If so, how did he become a disciple of Shengya?
However, the fact is that Cheng Jinzhou has clearly mastered the equation solution that the Star Warlock Association in Xingzhou has not mastered.Such an important solution is not disclosed to the public, who else could it be other than the people in the holy cliff who don't care about contribution points?
Hui Minren couldn't help thinking that the third son of the Cheng family in the file seemed to be bedridden all year round, and had enough rest time every day to avoid people's sight.During this time, a teacher suddenly appeared, it did not seem to be difficult.

The more he thought about it, the more people had various speculations about how Sheng Ya chose his disciples, but there was no definite answer. It seemed to be possible through teaching at the students' homes.And so far, Cheng Jinzhou seems to be doing very well.Although he is more like a bureaucratic nobleman, that is also his family attribute, a bad habit that will never get rid of in his life.

Jiang Huang and Kong Wei were not as skeptical as Hui Minren. Now they asked with less doubts: "Mr. Cheng, is there a process to prove your method?"

If it is an ordinary astromancer, it will be very happy to have an algorithm for high-order equations, unlike a fourth-level astromancer, who always considers more.

Just like the earth in the era, the current astrologists can already master various solutions to cubic equations, but they are not as simple and easy as Cheng Jinzhou's.

Cheng Jinzhou shrugged and said, "It's not perfect yet, but I will publish it in Science soon."

Where is he not perfect, he simply forgot to prove it.In the proof of the cubic equation, there is a part of the geometric derivation completed on the basis of drawing with a ruler and compass. It is impossible for a half-baked physics doctor like Cheng Jinzhou to remember the process.

Maybe one day with good luck, I will pick up a proof of the three-way method from the Star Alliance library.Cheng Jinzhou thought so.

The astrologers in Xingzhou couldn't force it, so they let Cheng Jinzhou go.

Without mentioning their guesses and discussions, Dr. Cheng Da returned to his room and began to think about the issue of the star array.

Zhuo Huan's threat didn't frighten him, but it still reminded him that when facing the fourth-level star warlock, the joint star formation between him and Lu Xu did not have an advantage.Instead of spending a lot of money on lovers in the future, it is better to improve your own strength now.

He is already a three-star star warlock, and the star power he can bear has also increased to more than 100 points, so he wants to find a star array that he can bear a little bit of star power and at the same time enhance his control over combinations.

Of course, the basic elements are indispensable. For example, when the star points that the star array endures remain unchanged, improving the power of the star array is a limited consideration, and it is best to modify it on the basis of the current star array.

Thinking of this, Cheng Jinzhou submitted the request to the "elder businessman", and he couldn't find anyone else who could carve and design the star array for him.

I thought it would take two days to get a response, but I don’t know if the elder Dashang was familiar with it last time. About three hours later, there was a message: 350 million stars can update the star array, and 1200 million star array can be redesigned .Three days are required to pay.

"So easy to talk?" Cheng Jinzhou was used to being abused by the customer service staff, and he had long forgotten the myth that the customer is God.

After thinking about it, Cheng Jinzhou sent another message, asking: What functions can be added by updating the star array.

Re-engraving is very troublesome and may reduce the ability to withstand star formations. Astromancers will not easily change star formations unless necessary.

This time, the message was sent back very slowly, and it took a long time to reply: What function do you want to add.

Cheng Jinzhou's mind suddenly turned, and the first thing he thought of was the "pulse" suggested by Li Xianfeng.Without much thought, he wrote down the requirement of "sonic pulse".

From a mathematical point of view, pulse is a very energy-saving attack method, because its decay is small, the total energy value is high, and the launch speed is fast, it is almost an ideal attack method, except whether it can attack the target Apart from the problems, such an upgrade is definitely beneficial and harmless.

As for the 350 million star yuan, it seems that it is not too much trouble. Cheng Jinzhou replied a confirmation message without thinking.

Yisu came out and said jealously: "My body is not ready yet, and you want to carve the star formation again."

"It's because you want too many materials." Cheng Jinzhou muttered a few words: "Think about it, it took us a month and a half just to extract beryl and the like, and the result was not enough for one-tenth of what we needed. , and you still don’t let me buy it in the alliance.”

Yisu was a little embarrassed and said, "Actually, it's okay to make it smaller according to my original design."

Cheng Jinzhou glanced at him suspiciously, and immediately realized that this guy was over-designed.He chuckled twice and said, "Since that's the case, I think it's best to shrink it to the minimum. I'll expand it for you when you have money. You used to say that appearance doesn't matter, but now it seems that you don't care too much." Put your heart into it, and tell me what you want to design like?"

Yisu had no choice but to mutter in a low voice.

Cheng Jinzhou listened and denied, trying to use the least amount of materials to make Yisu's body.

The materials he wanted were not cheap in the Star Alliance, let alone Daxia. Occasionally there were two cheap items, and the quantity was very small.Not to mention using the labor of the Star Warlocks.

……

(End of this chapter)