Can You Pass High School Entrance Exams? X^2 -X^3 =36

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Rashel's Classroom

Rashel's Classroom

Күн бұрын

Пікірлер: 16
@kevinsolari2744
@kevinsolari2744 2 ай бұрын
It's always a good idea to look for easy factors with qubics . We have x³ -x² +36=0 So x=-3 is an obvious solution. So we must have (x+3)(x² + ax + 12)=0 Thr coefficient of x in x³ - x² + 36 = 0 is zero So 3a + 12 =0 so x=-4 So we have (x+3)(x² - 4x + 12)=0 Then the quadratic equation gives x = (4 +/- sqrt(16- 48))/2 = 2 +/- 2sqrt(2)i
@nickcellino1503
@nickcellino1503 2 ай бұрын
If students had to answer this question correctly to be admitted into high school, every high school in the country would be nearly empty.
@rashel1
@rashel1 2 ай бұрын
its ok🙂
@soulxyt2302
@soulxyt2302 2 ай бұрын
Im peruvian and these types of questions are really common in national highschools exams, not that I like that nor I'm proud of it because it forces students to mechanize themselves and just memorize formulas and not understand the reasons behind its result
@mytok
@mytok 2 ай бұрын
Sorry, forgive me for asking but what’s the word you often say, “in this case, I can sizzily?” Just want to understand better. e.g. at 0:24
@AkumaKunMr
@AkumaKunMr Ай бұрын
I think he meant easily
@farhanabegum8779
@farhanabegum8779 2 ай бұрын
Its easy but long mathod❤️
@rashel1
@rashel1 2 ай бұрын
thanks for your opinion ❤️
@TheKnowledgeOfScience
@TheKnowledgeOfScience 2 ай бұрын
Thank you so much sir😢
@rashel1
@rashel1 2 ай бұрын
welcome ❤️❤️❤️
@sajidqureshi3169
@sajidqureshi3169 2 ай бұрын
Right 👍 answer
@rashel1
@rashel1 2 ай бұрын
thanks ❤️
@ugaugauga488
@ugaugauga488 2 ай бұрын
I hate those imaginary numbers.
@74HC138
@74HC138 2 ай бұрын
If you work with electronics, complex numbers are immensely useful.
@ugaugauga488
@ugaugauga488 2 ай бұрын
@@74HC138 Hey, now that you mention it, your username is a chip!
@ugaugauga488
@ugaugauga488 Ай бұрын
@@74HC138 I have that chip. I don't remember if I've used it but I have those logic 74 series chips. I really enjoyed them when I was learning back in the 90s.
Algebraic Expression #maths #mathstricks #shorts
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