Future library

After two to 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 three hundred years ago, mathematicians would duel with cubic equations?

Cheng Jinzhou didn't understand what the three star warlocks were thinking, so he solved all the more than ten cubic equations as quickly as possible. 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 watched for a while, and then it became clear that the formula Cheng Jinzhou used to apply the results was applicable to all cubic equations.

This discovery surprised and delighted them, and at the same time they were a little more confused - whether it was really possible to have a formula that could solve all cubic equations, which seemed to make many classic problems worthless.

Hui Minren couldn't help but pick up the answer in his hand and check it again, even though he had already printed the numbers on it 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 wavering.

In the past few days, he specially sent people to the Cheng family to inquire about information, and learned that Cheng Jinzhou had almost no time to study in the past ten years. In this case, how did he become a disciple of Shengya?

However, the fact is that Cheng Jinzhou has obviously mastered the solution to equations that even the Star Warlock Association in Xingzhou has not mastered. Such an important solution is not disclosed to the public. Who else could it be except the man from the Holy Cliff who doesn't care about contribution points?

Hui Minren couldn't help but think that the third son of the Cheng family in the files seemed to be bedridden all year round, and had enough rest time every day to avoid people's sight. During this period, it didn't seem to be a difficult thing for a teacher to suddenly appear.

The more he thought about it, the more it seemed to him that there were various speculations about how Shengya chose his disciples, but there was no definite answer. It seemed possible if he taught in the students' homes. And so far, it seems that Cheng Jinzhou is doing very well. Although he is more like a bureaucratic aristocrat, that is also his family attribute and a bad habit that will never change 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?"

An ordinary Star Warlock would be very happy to have algorithms for high-order equations, unlike a fourth-level Star Warlock who always thinks more.

Just like the earth in that era, today's star warlocks 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."

What's wrong with him is that he simply forgot to prove it. The proof of the cubic equation, in one section, was based on geometric derivation based on ruler and compass construction. It would be impossible for an inexperienced Ph.D. in physics like Cheng Jinzhou to remember the process.

Maybe one day I'll be lucky enough to pick up a copy of the Three-Way Proof from the Covenant Library. Cheng Jinzhou thought so.

The star warlocks in Xingzhou didn't want to force anything, so they just let Cheng Jinzhou go.

Putting aside their speculations and discussions, Dr. Cheng Da returned to his room and began to think about the star array.

The threat of Zhuo Huan Priest did not frighten him, but it still reminded him that when he actually faced the fourth-level star warlock, his and Lu Xu's combined star formation did not have an advantage. Instead of spending a lot of money on a lover in the future, it is better to improve your own strength now.

He is already a three-star warlock, and the star power he can withstand has increased to more than 100 points, so he wants to find a star formation that can slightly withstand the star power and at the same time enhance the controllability of the combination.

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.

With this in mind, Cheng Jinzhou submitted his request to the "elder merchant". He could not find anyone else who could help him carve and design the star array.

I thought it would take two days to get a response, but I didn’t know if the elder Dashang had mastered it last time. About three hours later, information came: 3.5 million star yuan can update the star array, and 12 million can redesign the star array. . Payment must be made within three days.

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

After thinking about it, Cheng Jinzhou sent another message and asked: 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 transferred back very slowly, and it took a long time to reply: What functions do you want to add?

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

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

As for the 3.5 million stars, it seemed that it was no longer a big trouble. Cheng Jinzhou replied with a confirmation message without even thinking about it.

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

"You asked for too many materials." Cheng Jinzhou muttered: "Think about it, it took us a month and a half just to extract beryl and the like, and the result was not even one-tenth of what was 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: "In that case, I think it's best to shrink it to the minimum. When you have money, I will help you expand it. You said before that appearance is not important, but now it seems that you are no less. Pay attention to it and tell me what you want the design to look like."

Isu had no choice but to whisper softly.

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 few. Not to mention using the labor of the Star Warlocks.

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