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
@nickcellino15032 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.
@rashel12 ай бұрын
its ok🙂
@soulxyt23022 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
@mytok2 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
@AkumaKunMrАй бұрын
I think he meant easily
@farhanabegum87792 ай бұрын
Its easy but long mathod❤️
@rashel12 ай бұрын
thanks for your opinion ❤️
@TheKnowledgeOfScience2 ай бұрын
Thank you so much sir😢
@rashel12 ай бұрын
welcome ❤️❤️❤️
@sajidqureshi31692 ай бұрын
Right 👍 answer
@rashel12 ай бұрын
thanks ❤️
@ugaugauga4882 ай бұрын
I hate those imaginary numbers.
@74HC1382 ай бұрын
If you work with electronics, complex numbers are immensely useful.
@ugaugauga4882 ай бұрын
@@74HC138 Hey, now that you mention it, your username is a chip!
@ugaugauga488Ай 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.