
"So, that's the steps in working on this kind of problem. Up here, anyone want to ask about matrices?" mr. Andre said ending the lesson.
There is no reason to make Mr. Andre nod his head. "OK, because no one said it, it means you assume everything has understood. All right, then you'll ask!"
The teacher smiled meaningfully making the students simultaneously gulp their hard-earned salivations. Mucus!
Mr. Andre's hand was dancing on the board. Apparently, he was writing about what he would propose later.
"Kids, who can answer this question you wrote?" ask Mr. Andre after writing a question on the board. His view leads to the students.
Here's what Andre wrote on the board.
Determine the values a and b of the following matrix similarity.
[ a + b ] \= [ 4a - 5 ]
[ 2a - 15 ] [ 6a + 7b ]
Again, no one said. The disciples simultaneously became impromptu statues.
"No one can?" guess Mr. Andre sounds upset.
For quite a while only silence struck the tense atmosphere of that class. Until not long a student on the second bench from the front of the middle row held his hands high into the air. "I, sir!" knock the girl.
All eyes turned towards him. Some looked at him cynically, sparkly, and also hesitated. No exception Renata, my countryman, who now looks doubtful at him.
It was opposite to the girl sitting on the bench behind them. The girl snorted cynically. An envious snort sounded from his lips. "But really!" his lips.
"Moon... ?" Mr. Andre called in doubt. Both of his eyebrows bend at each other. "Would you answer?" his tanyanya made sure and immediately got a steady head nod from the disciple.
"Yes, ahead!" tell Mr. Andre.
The moon rose from its seat and advanced forward. Arriving at the front, Mr. Andre immediately gave him a black marker. The moon picked it up and began working on the array of numbers on the board.
Answer :
a + b \= 4a - 5
-3a + b \= -5
2a - 15 \= 6a + 7b
-4a - 7b \= 15
\=>Elementation Method :
-3a + b \= -5 | x (-7) | 21a + (-7)b \= 35
-4a - 7b \= 15 | x 1 | -4a - 7b \= 15
--------- -
25a \= 20
a \= 20/25
a \= 4/5
a \= 0.8
\=>Substitution Method :
-3a + b \= -5
-3(0.8) + b \= -5
-2,4 + b \= -5
b \= -5 + 2,4
b \= -2,6
So, the value of a \= 0.8 and b \= -2.6
"Already, Sir!" say the Moon while closing the marker that has just been used and thrust it back to Mr. Andre.
Mr. Andre seemed to observe well the answer the Moon had written on the board. Then before long, the man was bearded along with a wide smile imprinted on his lips.
"Good." chirped Mr. Andre. Then his gaze turned to the girl standing next to him. "Your answer is right!" he said again with a tone of praise.
"Thank you, Sir!"
The moon turned around and stepped back into her seat. She bit her lips in shame because she was now the center of attention. Many adoring gazes were fixed on him.
The moon glanced sideways when it felt that the person sitting there was staring at it. And right, the guy was smiling towards him complete with his amazed look that could not be satisfied in both his eyeballs.
Moon jerks. His hand immediately grabbed his left chest as he felt a quick thump there.
What's the matter?
What is this feeling?
Honestly, the Moon doesn't know. Because this is the first time the Moon has felt this strange, unnatural thing.
Slowly but surely, the corners of the Moon's lips curved upwards to form a smile.
And in addition, among the adoring gazes tucked some cynical gazes at him. One of them was the girl sitting behind his stool. Moon realized the girl was very dislikeful of his arrival at this school. For reasons and reasons, the Moon does not know.
And again, the scene that had just happened seemed familiar to the Moon's memory. It was as if he was feeling deja vu. The girl frowned thinking hard. But when did that happen?
***
The break sign buzzer echoed throughout the Mahardika High School class. Interrupting the teachers who are still faithful to explain the material in front of the class. Like Mr. Andre, the math teacher who was teaching in the XI IPA 2 class immediately stopped his teaching activities.
"Our meeting is quite up here, good afternoon!" Finished packing things on his desk, the teacher greeted the students and walked out of the classroom.
"Your, Pakkk!" reciprocated simultaneously by all students.
And coinciding with that, they immediately scattered out of the classroom. Classes that were quiet, now noisy like being doing buying and selling activities in the market.
Likewise with the Moon which is now packing his writing equipment into a bag. His activities came to a halt as Renata called out his name. He looked quickly and asked questions.
"To the cafeteria together, yuk!" bring the girl to shine with hope.
"But-"
"Relax, I treat you" Renata interrupted the Moon's speech. Though just now, the Moon will reject him because he wants to go to the library.
"Yes, oh!" Sighs, Moon resigned. Nodding the head and then being seen from it makes Renata more sparkling.
Just as the two were about to move out of the classroom, two guys came blocking their way in the doorway. They are Bintang and Surya, two friends whose brains are equally aglek.
"Hello, pretty!" greet the flirtatious Star, clearly fixed on the Moon.
When the Moon displayed a flat look as if the flutter of the Star just now had no effect on him, Renata turned the eyeball instead. Seems to be caught off guard by the sightings of two demons who are unceasingly disturbing the girls. Don't tell me he and their next victim's moon again. Don't make!
Yes, Bintang and Surya are two friends who are famous for their mischief and playboy in school. I don't know how many girls they managed to gandrungi. I don't know how many hearts have been broken because of the actions of the two crocodile demons. You crocodile is human!
"You want both of you? Move aside, don't interrupt us! Find sono's prey! We're laper, going to the cafeteria!" The tone of expulsion in Renata's speech just now was clearly very obvious.
Surya raised her pupils. "Oh, go to the cafeteria!" The man then shouted. His body he slightly shifted to the side as if giving way to the two princesses.
Smiling then joking, "Yes already, here with aa' tamvan," he said as he raised his eyebrows teasingly. Do not forget his right wrist has been pointed to the side as if giving access for one of the girls to hold him.
The three shuddered in horror. Even the star who had taken over had the two girls bombed, staring at the disgust of his cursed friend. Confused wrinkles are no less decorating the forehead. It was very desirable for him to shout in front of Surya's face, "It's out of the context of an early moron!!!".
But alas, it can all only be held back and loosened in the throat. Only a dead red face was displayed and both hands were clenched at the sides of the body, a sign of anger controlling him.
"Diem! Shameful bastard!" The star slightly drew closer to Surya and hissed a little right in the man's ear. His growl sounded so terrifying in Surya's ears.
Surya with a deathly pale look can only chuckle while scratching his nape that does not itch at all. The really clumsy atmosphere at the moment made him act like a fool. "Eh, oh! I was timid, yes," she grinned with a look full of error.
The stars closed their eyes tightly. In his braid, his teeth were snapped. I swear, Surya really made her emotional this time. If only there were no two beautiful girls in front of him at this time, Surya would have been killed by him earlier.
"Dropped!" his lips, then passed just like that out of the doorway with both hands narrowed in both pockets of gray pants. He left Surya still in place. The man really did not know the behavior of the stars. It's strange! Her lips in heart.
Glancing at the two girls in front of him who had heard faintly his interaction and the Stars, Surya displayed a friendly grin.
"To the cafeteria next time, beautiful! I want to follow my monkey first. He's licking again, hehe. Biasa, lately he is very sensitive. I think it's pms again, deh!" surya started ngolor kidul, then moved from there.
Leave the Moon and Renata looking at each other. The two girls were both displaying their confused gurgles.
"Based on a freak! Not clear!" cibir Renata with a snort before inviting the Moon to continue their steps to the cafeteria.
***