2x2=5? Good math trick!
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Uploaded by Mindenbinder on Mar 10, 2007
What is wrong in equation? Can you solve it?
- 3,615 likes, 5,379 dislikes
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no its not, because A,B and C can be chosen so that (B-C-A)=0 therefore you are not allowed to divide anything by it (not even itself). before dividing by something you ALWAYS proof that its not zero.
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no thats wrong. before dividing by variables e.g. (B-C-A) you have to proof that there is no combination of A,B and C for which the expression (B-C-A)=0. for sums like the one in the video THIS IS NOT POSSIBLE. you cant rule out the possibility that (B-C-A)=0 therefore you are not allowed to divide by it. one of the few expressions where you are allowed to do so is if the variable is a power, e.g. 5^x because there is no number for which 5^x=0.
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4 cannot = 5 so its false.
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@topicmirsad We keep going in circles. I do realize that you can't divide by zero. For a moment, forget about the solution set (4,5,1) and look just at the algebra. What I am trying to say is that all algebraic rules used are valid, even up to the point where he writes A = B, which we both know isn't true with the given solution set. Every step of his algebra is valid. Step 2 created the anomaly. Thanks
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is 3:08 wrong?
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i dare you click F13
8 hours ago 2
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omg what a noob! how old is he? 8 maybe :D
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lol he made a youtube account for 1 video
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with my magic fairy 2+2= fish jajajajajjajajajaja
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@theswedenguy1996 (facepalm) i dont care what your father says he is ignorant for believing that and you are an idiot for believing him after you've been present with evidence that proves otherwise. if you won't listen to youtube experts than look up "why you can't divide by 0" on google or something and watch every site you come across tell you dividing by 0 is impossible
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It is not an issue whether the equation is true or not.
Issue is the conclusions you draw from that equation.
Example:
x*0 = y*0
We know this equation must be true because 0=0 is solution.
Can we draw a conclusion that x=y from this equation?
I hope your answer is no, because anyone that answers yes needs to go back to elementary school and learn some math.
odise25 1 day ago 15
One of the last steps where he crosses out (B-C-A) on both sides is illegal. To do this you would need to divide both sides by (B-C-A) yet that is dividing by zero. B-C-A = 5-1-4 = 0.
WarmWeatherGuy 1 day ago 5