After being teased by the girl, even with Han Du's mentality, he couldn't help but blush. After chatting for a while, Han Du said goodbye and left, not forgetting to bring the girl's answers with him.
As soon as he returned home, Han Du immediately ordered his maid to find Yu Qian.
Han Du hadn't finished his cup of tea when Yu Qian came.
"Teacher, are you looking for me?"
Han Du nodded and motioned for Yu Qian to sit down. After Yui Qian sat down, he put down his tea cup and held his hands in front of his stomach, and asked in a calm tone: "I asked you to announce the problem at the beginning, but I seem to remember not asking you to say that as long as someone can solve it, you will give away the reward directly. Give it to the other party?"
Yu Qian thought that the teacher was blaming him, so he quickly explained with a smile: "The disciple did make an impromptu decision and did not discuss it with the teacher in advance. It is my fault."
Han Du looked at him and sighed deeply: "If I just want you to admit your mistake, then why should I call you here?"
Yu Qian was stunned for a moment and quickly explained: "This disciple is indeed a little impulsive, but it shouldn't be a big problem, right?"
"Oh? Why do you think the problem is not big?" Han Du asked with a faint smile.
Seeing this, Yu Qian thought that the teacher just scolded him casually, and said with a smile: "This question is very difficult, and it took the disciple a long time to solve it. It is impossible to solve it in just a few days." Possible things."
Han Du glanced at him and chuckled, "Do you really think no one can solve it? Then look at what this is."
After finishing speaking, Han Du took out Han Jingyun's answer and handed it to him.
Could anyone really solve it in such a short time? Yu Qian was a little confused and a little unbelieving.
I took the paper handed by the teacher and opened it. A look of confusion suddenly appeared on my face. There was no picture at all on it, let alone a regular heptagon. What did the teacher mean?
Seeing Yu Qian's confused eyes, Han Du pointed at the answer in his hand calmly: "Look carefully."
Yu Qian lowered his head to look carefully again, and soon he found clues, and he couldn't help but show a slight surprise on his face. As he continued to read, the expression on his face became more and more serious, until he finally let out a long sigh: "I admire it, I really admire it! Using algebraic methods to solve geometry problems is simply unheard of, unheard of!"
Before Han Du could speak, Yu Qian lowered his head again and looked at the problem-solving method from beginning to end. He felt a sense of relief all over his body and trembled with excitement.
"Awesome, really amazing." Yu Qian was shocked and shook his head repeatedly: "Algebra and geometry are two completely unrelated fields, and they can be connected? Doesn't that mean that there is also a connection between algebra and geometry? Yes, but we didn’t know it before?”
"Now that we know that there are people outside the world, do you still dare to speak out nonsense?" Han Du decided to give Yu Qian a warning, hoping that he would think twice before doing anything in the future to avoid unnecessary trouble in the future.
Yu Qian had no intention of listening to Han Du's teachings. He suddenly raised his head and looked at the teacher and said, "Didn't the teacher realize? This problem-solving method has completely created a new knowledge!!!"
"Huh?" Now it was Han Du's turn to be surprised.
He suddenly grabbed the paper in Tai Qian's hand, lowered his head and looked at it carefully.
Yu Qian said quickly from the side: "Teacher, if the problem of geometry can really be solved by algebra, then the knowledge involved will be too great..."
Han Du looked at it again and raised his head after a moment. He had to admit that Yu Qian's thinking was sharp. Although I have seen this problem-solving process, I have not thought about the connection between algebra and geometry at all.
Seeing that the teacher didn't speak, Yu Qian continued: "Teacher, the person who solved this problem should be the Queen Mother, right?"
Han Du did not hesitate and nodded directly: "Not bad."
Yu Qian sighed with admiration: "I was indeed rash and forgot about the Queen Mother."
How can Han Du bother to teach Yu Qian a lesson now? He was pacing back and forth anxiously, and suddenly stopped in front of Yu Qian, saying: "Now is not the time to talk about this, your thoughts are more important."
want. Come, follow me into the palace to see the Queen Mother. "
Yu Qian glanced at the teacher in surprise, but before he could react, he was forcefully grabbed by the arm and taken away.
In one day, he entered the palace twice in a row.
Even Han Jingyun was very surprised, "Brother, what's going on?"
Then he looked at Yu Qian and said with a smile: "Yu Qian, you are good at mathematics."
Being praised so much by the first person in mathematics, Yu Qian showed a look of shame on his face, and he quickly saluted and said: "The Queen Mother is ridiculously complimenting me, and Yu Qian is too embarrassed to deserve it."
"You don't have to be humble. Being able to solve the problem on your own is indeed very impressive." Han Jingyun said with a smile.
After hearing this, Yu Qian felt even more uncomfortable. He was able to draw a regular heptagon, which he did only by chance after more than a year of hard study.
In other words, Yu Qian's success comes with a little bit of luck.
But this problem fell into Han Jingyun's hands, and she was able to solve it in just a few days. Moreover, the algebraic method was used, which gave Yu Qian the feeling of looking up at a high mountain.
Han Du didn't have time to wait for the two of them to be humble to each other. He directly took out Han Jingyun's problem-solving method and asked, "Sister, how did you come up with the idea of using algebra to solve geometry problems?"
Han Jingyun looked at it and smiled and said: "Brother, you want to ask this? There is nothing to say. When I heard the title, I was just curious to see if I could solve this problem through calculation. I didn't expect that after I tried it, it turned out that It really worked."
Han Du's eyes widened in surprise and he looked at the girl up and down.
Seeing his eldest brother looking at him so strangely, Han Jingyun also became confused, "What's wrong?"
"Isn't the girl studying the connection between algebra and geometry?" Han Du asked.
"The connection between algebra and geometry..." Han Jingyun frowned, and the next moment he understood it instantly, his eyes lit up and he said with surprise: "Brother, what you mean is that there is some kind of connection between algebra and geometry? This is a new knowledge!"
"Brother is really amazing, he can even think of this."
Of course Han Jingyun knew that the eldest brother must have thought of this after seeing her solve the problem of drawing a regular heptagon with a ruler through algebra.
But even so, it is very powerful. At least, she, who uses this method, didn't think of it.
"It's not me." Han Du shook his head with a smile, "If I could have thought of it, could I have waited until now? I would have thought of it the moment I saw your answer."
Of course Han Jingyun would not think that the eldest brother was being modest. In addition, the eldest brother was so eager to bring Yu Qian to see her. She immediately looked at Yu Qian: "Did you think of it?"
