Oh yes, I can solve it! Obviously it has to be negative (the only way for the result to be positive), so testing the more obvious numbers "-3" was easily found ✅️ (considering only real numbers, of course)
This is at least the second video of yours that I've seen where you have gone to extraordinary lengths to get a wrong answer to a very simple problem. To be fair, I did see one video where you did get the right answer, but again went through a dozen complicated, unnecessary steps when you essentially had the answer in the third step. Edit: BTW, I don't know if your answers are wrong in this video. They're just certainly not the most obvious -- or real.
altenative solutions: One: ---------------------------------------------------------------------------- use polynomial division, also called short division (why none of the math cracks on YT knows this method?) x³ - x² + 36 = 0 has the solution x = -3 (found by inspection as (-3)³ -(-3)² = -36) (x³ - x² + 36) : (x+3) = x² -4x +12 solve x² -4x +12 = 0 by the standard method. ---------------------------------------------------------------------------- Second: ---------------------------------------------------------------------------- Factorize the polynomial x³ - x² + 36 = (x² + ax +12)*(x+3). Find the missing a by comparing left and right site after unfacorizing it.
Oh yes, I can solve it! Obviously it has to be negative (the only way for the result to be positive), so testing the more obvious numbers "-3" was easily found ✅️ (considering only real numbers, of course)
Amazing ✌️✌️
This is at least the second video of yours that I've seen where you have gone to extraordinary lengths to get a wrong answer to a very simple problem. To be fair, I did see one video where you did get the right answer, but again went through a dozen complicated, unnecessary steps when you essentially had the answer in the third step.
Edit: BTW, I don't know if your answers are wrong in this video. They're just certainly not the most obvious -- or real.
What! Before coming to a conclusion about a given answer I usually do a lot of research and there's no way my answer can be wrong 😀😀
-3
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altenative solutions:
One:
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use polynomial division, also called short division (why none of the math cracks on YT knows this method?)
x³ - x² + 36 = 0 has the solution x = -3 (found by inspection as (-3)³ -(-3)² = -36)
(x³ - x² + 36) : (x+3) = x² -4x +12
solve x² -4x +12 = 0 by the standard method.
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Second:
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Factorize the polynomial x³ - x² + 36 = (x² + ax +12)*(x+3). Find the missing a by comparing left and right site after unfacorizing it.
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Send knec exame 2024 pretechniical studies grde7
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-3 ~ 3 seconds
Wow! You are that fast?! 😀😀
@@Akoremmy I'm not that fast. It took me a minute and a half (in my head). But then, I haven't had algebra since 1969.
@Astrobrant2 Wow