Ye Huai'an was not shocked or annoyed, and said slowly: "Teacher An should have been teaching for more than 20 years, right?

An Shiming snorted and didn't answer, he acquiesced to Ye Huai'an's statement, he wanted to see what powerful remarks this rampant offspring had.

Ye Huai'an smiled slightly: "Since Mr. An has done so many problems, he must be so familiar with the unknown number X that he can't be familiar with it anymore, right?" Then I want to ask Mr. An a question, why should the unknown be replaced by the letter X?"

An Shiming was stunned for a moment, he imagined in his mind that Ye Huai'an would say something righteous and righteous, and how tricky and difficult the question was, but he didn't expect it to be such a strange question! In his opinion, this is like why you call Ye Huai'an, why I call An Shiming, why the table is not called the bench, why the bench is not called the table, everything is already predestined.

Ye Huai'an's question not only troubled An Shiming, but also the other two teenagers, why do unknowns use X as a representative? Oh my God, the ghost knows why X is used!

An Shiming was silent for a long time, but finally refused to admit defeat in his heart, and said the answer he felt was the closest to it: "Because the person who created this unknown gave him the name X." ”

Ye Huaian smiled lightly and shook his head slowly. An Shiming immediately couldn't wait to ask: "Then why do you say it!"

Ye Huai'an glanced at the two young men next to him and said with a smile, "Do you know where the numbers first came from?"

Zhang Wei just wanted to speak, but An Hanyu preemptively said: "Arabia!"

Ye Huai'an nodded and stretched out a finger and said, "That's right, as early as the beginning of the Common Era, after the Arabs invented Arabic numerals, the Spaniards brought Arabic numerals to the West. And there is a dense and complex arithmetic system, and its name is "al-jabr", which is later known as algebra in our math class! There is a word called al-shalan, which means unknown, but there is no SH pronunciation in Spanish, so they can't pronounce the word shalan, so the clever Spaniards created a system that borrows the pronunciation of CK, which is derived from the ancient Greek word X.

Later, when the Spanish translated al-jabr into Latin, the lingua franca of Europe, they replaced the Greek word X with what we pronounce today!

Ye Huai'an's explanation was jaw-dropping, Zhang Wei's mouth and chin were about to fall to the ground, and An Hanyu was even more full of Venus in his eyes, looking at Ye Huai'an full of admiration. He was the first to say that his grandfather had nothing to say, and he was also the first to make his knowledge of mathematics so interesting. Looking at An Shiming's performance again, his eyes were also round, and it took a long time to come back to his senses and laugh and say: "Hahahaha! I am convinced! I have been a math teacher for 27 years, and I have done thousands of equations, but I have never thought about this problem, a little X actually has such a tortuous story! It is well told! It is so good!"

The corners of Ye Huai'an's mouth curled, he was very satisfied with everyone's expressions, and he hugged his fists at An Shiming and said, "In Xia Ye Huai'an, it's Principal You'......"

As soon as he was halfway through speaking, An Shiming stretched out his hand to stop Ye Huai'an and said: "I know it's you, I have long heard Principal You say how great you are, how talented you are, and when you see it today, you really live up to your reputation! What you said is very reasonable, even if you do the question thousands of times, it is useless not to understand the truth! Everyone understands the truth, but how much has you really done? In the end, when you take the exam, you don't just look at the score?"

Ye Huai'an did not refute An Shiming's words, and said slowly: "That's right, but what Teacher An wants to get in the end is a full score test paper?"

An Shiming's forehead was slightly raised, and a glimmer of light flashed in his eyes under the silver-rimmed glasses, and he didn't answer the words and listened carefully to what Ye Huai'an said. "What Mr. An wants is not a perfect score, nor is he admitted to a good university, but he hopes that his children and grandchildren can live a happy life! But can a test paper really determine the happiness of life? This answer is unknown, I use a set of data to illustrate, you can get 100% into a good university with a full score, but can you get a good job after graduating from a good university? The answer is 80%Yes! So can you find a good wife or husband if you find a good job? The answer is 50%! If you find a good wife, will you be able to live the happy life of your dreams? This answer is not even 30%!"

Ye Huai'an's voice became louder and louder, and he stretched out a slender index finger to press the test paper on the desk and said: "Since the grades are so good, why don't even 30% of the people who live the kind of life they want in the end? Because they didn't like this path from the beginning, but because of various reasons in their families and society, they are getting farther and farther away from the life they want! In this case, why don't you take a ...... of your own from the beginning?"

Before the words were finished, An Shiming interrupted Ye Huai'an's words: "Okay! I know what you want to say!But I want to know more about how you want to do it!" An Shiming had to interrupt Ye Huai'an's words, these words had an extremely strong impact in front of the two immature students, looking at An Hanyu's frowning and thinking appearance, if Ye Huai'an continued to speak, I am afraid that his grandson will not have the heart to go to school in the future.

Of course, Ye Huai'an knows what kind of consequences his words will bring to his students, just like you, who have been told by others to study hard since you were a child that you can live a good life, but when you grow up, you find that even if you study hard, you can't live a good life! The conflict between this kind of tradition and reality is very easy for students to become bored with learning, but he just wants to let students think, not blindly study.

An Shiming stared at Ye Huai'an and continued: "I know your intention, Principal You told me, but it is absolutely impossible to let my grandson go to the experimental class! Even if I agree, his parents will not agree, no matter how good the experimental class is, it is still an experimental stage after all, no matter how problematic the ordinary teaching method is, it is impossible to have a problem with me after so many years of improvement, I can't let my grandson gamble, and you also said that there is still a 30% possibility!"

An Shiming's refusal made Ye Huaian a little frustrated, it seemed that this matter was not as smooth as imagined. Ye Huaian had just stood up, and An Hanyu, who had not made a sound for so long, suddenly said loudly: "What's your name?"

Ye Huai'an was stunned for a moment, and then smiled: "My name is Ye Huai'an, you can call me Teacher Ye." ”

An Hanyu asked with a serious face, "Are you a math teacher?"

Ye Huaian shook his head and said, "No, why do you ask that?"

"Then why do you know that X represents the reason why the unknown? Why do you study this?" An Hanyu was very curious about Ye Huai'an's knowledge, what would the person who studied this question think in their minds?

The corners of Ye Huai'an's mouth raised, and he reached out and touched An Hanyu's head and said, "Because I want to know, I want to know why X represents an unknown, so I went to research." ”

"Then can you tell me why the square uses 2 and Newton uses N?" Stimulated by Ye Huai'an's question, An Hanyu suddenly felt that the mathematical physics that he thought he had learned thoroughly suddenly had a lot of problems that he didn't understand.

Ye Huaian shook his head and said, "I don't know, if you want to know, go find the answer yourself in the future." After speaking, he was about to leave, and suddenly remembered An Shiming's voice behind him: "Wait a minute! If you really have any good ideas, write a plan and I'll take a look, maybe I can think about it." ”

Ye Huai'an turned his head and bowed to An Shiming, who was looking at him, and said, "Thank you, Mr. An!" The attitude was extremely upright, but no one saw the smug smile on the corner of his mouth when he lowered his head.