"Thank you." Li Zisang smiled at Su Jingzhi, and then walked into the room.

As usual, Su Rufeng was in the living room to mark papers and prepare for class, and Su Jingzhi sat on the ground and lay on the coffee table to do homework.

Su Jingzhi ran into a problem and bit the tip of the pen, looking at the math homework, he didn't listen to it well when he delayed it today, and the result is not now, the problem is that the quadratic function y=2x2-4mx+m2, if the image of this function passes through the point (2.-4) to ask the function analytical?

Su Jingzhi only felt that there was a figure around him, and before he could reflect that the pen in his hand was taken away, Li Zisang knelt beside Su Jingzhi and looked at this question and asked, "Won't it?" Match"

Su Jingzhi nodded a little embarrassed.

Su Rufeng raised his head and looked at it, chuckled and lowered his head and continued to revise the paper.

Li Zisang's slender and slender fingers took out the ruler from Su Jingzhi's stationery bag and drew a neat function diagram, Su Jingzhi saw such a clean and beautiful drawing for the first time, and he didn't even believe that this function diagram came from these hands.

Li Zisang pointed to the diagram and said, "Because the function image passes through (2,-4)

∴2×22－4m×2＋m2=－4

m2－8m＋12=0

(m－2) (m－6)=0

m=2，m=6

∴ analytic formula is y=2x2-8x+4

or y=2x2-24x+36"

Su Jingzhi looked at the picture seriously.

"Actually, it is not difficult, bring (2.-4) into y=2x2-4mx+m2, and get -4=8-8m+m2 to get m2-8m+12=0 to solve m1=2m2=6 The analytic formula of the function is y=2x2-8x+4 or y=2x2-24x+36." Li Zisang's dark eyes were full of stars, "Didn't you listen well in class?" ”

Su Jingzhi raised his head and looked at Li Zisang with some embarrassment: "When you are in class...... I walked for a while. ”

Li Zisang laughed: "Is there anything else?" ”

"Well, there is...... This one isn't quite good. ”

Did Su Rufeng look up and see the two children sitting there...... One speaks seriously, and the other listens attentively.

Li Zisang is like a dedicated little teacher, in addition to explaining it to Su Jingzhi, he will also come up with a question for Su Jingzhi to do to ensure that Su Jingzhi really knows.

Su Jingzhi is also very smart, as long as Li Zisang mentions it a little.

The smile in Su Rufeng's eyes became more and more intense, and he seemed to like the picture like this very much...... So...... If you take Jing Lan back, I don't know if Jing Zhi can get along with Jing Lan like this?

In the early morning of the next day, when Su Jingzhi had already packed his schoolbag and was about to leave, Li Zisang also got dressed and wanted to go with Su Jingzhi.

"You should rest more at home." Su Rufeng put his coat on the crook of his arm and arranged his collar.

"I want to go out and call home and have someone pick me up." Li Zisang said softly.

"There's a phone at home." Su Rufeng laughed, "You can use it." ”

How could Li Zisang not know that the Su family had a phone, but ...... In case Steward Hu is really the second uncle's person, then ...... will affect the Su family.

Li Zisang smiled: "I'll go outside to call in a public phone booth." ”

Su Rufeng no longer stopped him, and handed the family to Li Zisang.

Li Zisang's heart warmed.

Su Rufeng put on his coat, rubbed Li Zisang's little head, and then went out first: "Dad, I won't send you when it's late, so I'll leave first......"

"Good!" Su Jingzhi responded sweetly, turned to look at Li Zisang, "I'll accompany you to make a phone call, and after the call...... You come back and rest. ”

"Hmm!" Li Zisang nodded.

Li Zisang and Su Jingzhi stepped on the snow and came to the station together, and Su Jingzhi saw that there was a newspaper kiosk that was about to pull Li Zisang over to make a call.

Li Zisang grabbed Su Jingzhi's little hand through his gloves: "It's not safe here...... When they come, they will find out your house. ”

Li Zisang's eyes flickered brightly and darkly.

Su Jingzhi nodded vigorously, what Li Zisang said was reasonable, she bit her lip and said, "Go to the school, anyway, they already know where the school is." ”

"Good!" Li Zisang responded, but he didn't let go of Su Jingzhi's hand.

"The car is coming!" Su Jingzhi grabbed Li Zisang's hand and rushed to the car.

This is Li Zisang's first time on the bus, and his nervous palms are a little sweaty, if it weren't for Su Jingzhi pulling him, he might not have the confidence.

Su Jingzhi invested two yuan and pulled Li Zisang to run back and occupy a seat, and then dragged Li Zisang over and sat there, holding the seat with her little hands, and she staggered as more and more people came up.

Li Zisang wanted to get up: "You come and sit ......"

"It's okay...... You're still sick! The corners of Su Jingzhi's lips raised.

Li Zisang was almost out of breath, and more and more people got on the bus...... Li Zisang never knew that the bus was so crowded.

The driver closed the door and started the car suddenly, and the whole car shook and fell backwards, and Su Jingzhi sat in Li Zisang's arms without holding it firm.

Su Jingzhi was so shocked that he hurriedly got up, but was wrapped around Li Zisang's arms and pressed on his legs.

Su Jingzhi's face turned red suddenly, and she turned her head to look at Li Zisang's pair of watery eyes like jewels, shining with a timid and shy light.

Li Zisang looked out the window, and his arm around Su Jingzhi tightened slightly.

Su Jingzhi bit his lip and turned his head, hanging his head very low...... I'm very embarrassed, in fact, Su Jingzhi didn't sit down well all the way, she was afraid that her toothache would hurt Li Zisang's leg, and she almost concentrated all her strength on the hand of the chair in the seat in front of her, which was even more uncomfortable than standing.

As soon as they got out of the car, both of them stood there with red cheeks.

Su Jingzhi covered his face with gloves with rabbit dolls, and turned his head with a watery look: "That...... Let's go call. ”

"Hmm!" Li Zisang answered.

Su Jingzhi was shy, and he didn't see if there was a car and was about to cross the road, and a car rushed over.

"Be careful!" Li Zisang grabbed Su Jingzhi into his arms.

Su Jingzhi's little face crashed into Li Zisang's arms, his heartbeat became more and more violent, his throat tightened for a while, and he hurriedly withdrew from Li Zisang's arms, panting and turning around, his eyes trembling terribly.

"The scenery ......," Li Zisang called in a low and beautiful voice.

"Hmmm! Let's go over......" Su Jingzhi ran towards that side first.

Li Zisang followed closely behind, with a smile on the corner of his lips.

When he picked up the phone, Li Zisang hesitated...... I have always had people around me when I grew so big, so the only phone numbers I can remember are my father's mobile phone and Steward Hu's mobile phone...... And the phone at home.

Li Zisang gritted his teeth, in fact, he still doesn't know if Steward Hu is the second uncle's person, so ...... Think of it as a test, because if it's a coincidence, it's not a coincidence.

Li Zisang dialed Steward Hu's mobile phone.

"Hey......" a deep voice came from the other side.

Li Zisang turned his head and saw Su Jingzhi's watery eyes, all of which were nervous and expectant.

Li Zisang smiled at Su Jingzhi: "Steward Hu is me." ”

The voice over there paused slightly: "Young master! Where are you? ”

"I'm still at the school gate, didn't you send someone to look for me?"

"I sent someone, but I don't see the young master, young master, don't go where you are waiting to get it, I'll be there right away."

"How long?" Li Zisang's eyes sank slightly, and he turned around for fear of scaring Su Jingzhi.

"Five minutes."

"Good!"

Li Zisang hung up the phone, and Su Jingzhi's little face came up: "How is it?" When will I pick you up? ”

"Five minutes later."

Su Jingzhi laughed all of a sudden: "Okay...... I'll wait here with you. ”

As he spoke, Su Jingzhi saw the sweet potato seller at the school gate, bought a sweet potato, broke it in half and handed it to Li Zisang.

Li Zisang looked at what Su Jingzhi was holding in his hand and seemed a little surprised...... This thing...... Can I eat it?

After all, Li Zisang used to be a pampered young master, and these things ...... He hadn't even seen it, let alone eaten it.

But looking at Su Jingzhi's eyes, Li Zisang still took the hot palms and felt painful.

Su Jingzhi giggled, the sound was like a silver bell, she took off a glove to help Li Zisang put it on: "It won't be hot if you hold it with this hand." ”

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PS: After Su Jingzhi's side update is completed, we will start to update our Huan Fan ......