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maths help pleasee URGENT
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https://www.youtube.com/watch?v=mh3K...annel=ZPhysics
at 6:41 of the video, am I being dumb or is the guy making a mistake?
(on the right-hand side you can see his working) if he's squaring the entire thing, shouldn't the 2 also be squared? :
though the method seems wrong to me, it gives the correct answer..
Thank you sm in advance <3
at 6:41 of the video, am I being dumb or is the guy making a mistake?
(on the right-hand side you can see his working) if he's squaring the entire thing, shouldn't the 2 also be squared? :
though the method seems wrong to me, it gives the correct answer..Thank you sm in advance <3
Last edited by Qxi.xli; 1 month ago
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#2
I watched it as well and I don’t know if I’m being thick or if he did do it wrong? I don’t see why it wouldn’t be squared as well but maybe there’s something I’m forgetting? If the answer is right then I’d assume that it is the correct method and maybe just ask your teacher to explain?
Last edited by Cloudias; 1 month ago
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(Original post by Cloudias)
I watched it as well and I don’t know if I’m being thick or if he did do it wrong? I don’t see why it wouldn’t be squared as well but maybe there’s something I’m forgetting? If the answer is right then I’d assume that it is the correct method and maybe just ask your teacher to explain?
I watched it as well and I don’t know if I’m being thick or if he did do it wrong? I don’t see why it wouldn’t be squared as well but maybe there’s something I’m forgetting? If the answer is right then I’d assume that it is the correct method and maybe just ask your teacher to explain?
...no worries thanks anyway 
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#4
(Original post by Qxi.xli)
yeah i would but the test is tomorrow morning lol so i don't think she'll respond in time...no worries thanks anyway 
yeah i would but the test is tomorrow morning lol so i don't think she'll respond in time
...no worries thanks anyway
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(Original post by Cloudias)
Lmao fair enough, I hope someone smart sees this and can explain 😂
Lmao fair enough, I hope someone smart sees this and can explain 😂
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(Original post by Cloudias)
Lmao fair enough, I hope someone smart sees this and can explain 😂
Lmao fair enough, I hope someone smart sees this and can explain 😂
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#7
Not gone through it carefully but he mentions a sqrt(2) multiplying d, squaring that would cancel one of the 2s on the denominator, leaving what he has as ok (9*2 rather than 9*4).
But not gone through carefully.
Good luck with the physics olympiad.
But not gone through carefully.
Good luck with the physics olympiad.
Last edited by mqb2766; 1 month ago
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(Original post by mqb2766)
Not gone through it carefully but he mentions a sqrt(2) multiplying d, squaring that would cancel one of the 2s on the denominator, leaving what he has as ok (9*2 rather than 9*4).
But not gone through carefully.
Good luck with the physics olympiad.
Not gone through it carefully but he mentions a sqrt(2) multiplying d, squaring that would cancel one of the 2s on the denominator, leaving what he has as ok (9*2 rather than 9*4).
But not gone through carefully.
Good luck with the physics olympiad.
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