Welcome to 3minutemaths! This channel is all about GCSE maths revision, and focusses on the topics needed to pass GCSE maths, with all the main boards: Edexcel, OCR, AQA and Eduqas. I have worked as a maths tutor for over 20 years, both privately and within schools, tutoring a wide range of students on all areas of the curriculum - from foundation to higher level topics.
The videos support my own worksheets, and are posted every Tuesday. They are all based on similar exam questions, and definitely proofread by my students! Please do let me know if there are any particular topics, either through the comments on the channel, or directly by visiting 3minutemaths.co.uk.
Any thoughts, comments or ideas are very much appreciated. Please do subscribe, and I'll look forward to seeing you soon :-)
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Made short and easy. Thank you 🙏🏽
@@myaandjamba8028 That’s great and very glad to help - all best S :-)
just subscribed, amazing channel.
@@sadiaafroz5479 Very welcome and very glad to help! All best S :-)
Who is here in 2024
I’m still around! :-)
❤ perfect
Very welcome and glad to help - all best S :-)
❤❤❤❤
@@evelinekauma683 Glad to help and all very best S :-)
For the first part, I started with 3^LHS = 3^RHS then used the properties of logs and powers to simplify, everything simplifies down to the quadratic equation. Your working is more elegant.
@@adamlea6339 Hi - yours would work just as well … but thank you for the comment! All very best S :-)
[ With Logarithms, first always calculate the valid domains ] In any log_a(b), we should have b > 0, and a > 0 and a != 1. Here, a is already 3. Thus, we just need to ensure that x + 1 > 0 and x - 1 > 0, which implies that x > 1. 3x^2 - 7x + 2 = 0, has two solutions x = 1/3, x = 2. Since x > 1, we only accept x = 2. In this case, if you approach the problem systematically, there is no need to check the solutions. Just satisfy as per the domain, because the operations involved don't produce any loss of information. In some other types of questions, where you would need to square somewhere, the sign information gets lost, and then in the end, you will need to keep back the solutions in the original equation and verify.
@@sukritshankar03 Thank you :-)
!
You missed something. You have to plug the values back into the original equation and when you do that, 1/3 - 1 = -2/3 < 0. log of that is not defined so 1/3 is not a solution. 2 is the only one available.
Yes - very good point - thank you. :-)
Hello sir! how to make your own mathematical formula?
Thanks🎉
@@gadha5202 Very welcome and glad to help - all best S :-)
dam i am here from the clip of your HCF i thought that your channal had grown bigger but i feel very sad that it didnot happened that way but sure have a good luck
@@romasingha8017 Thank you - and hope the videos help! All very best S :-)
My teacher gave me this as homework and I didn't know what to do this helped a lot 😊
That's great and very glad to help - all best S :-)
to say that was helpful would be a total understatement! now, after watching many videos, your video makes it real...I understand the purpose of this completely, only sampling 11 girl students is manageable! but honestly, how do we choose those 11 girls, is it a simple random, or do we just choose 11 girls, or what? thank you very much! so glad i found you!!
Hi - very glad the video helped and thank you for your comment! These questions are a little contrived, specifically for exams. Sampling techniques to minimise bias is a whole other topic :-)
Wait, this is the required level for LBoro? "We normally expect applicants to have a minimum of grade 4/C in GCSE English Language and, for most courses, GCSE grade 4/C in Mathematics. " :v
Hi - yes, grade 4 is considered a pass ... these questions are just taken at that level, although an exam paper will range upto grade 5 (foundation level) to grade 9 (higher level). All best S :-)
@@3minutemaths in appaled how low is the bar
only difference is i would do it log9 / log2
No worries and would work just as well. All best S :-)
God knew I’d be too powerful, if I could learn math
Lol - hope the video helped and all very best S 😀
Had a quick go, got eveything but the minus 1, reread the question 'shaded area'! Not just big hexagon. Suppose thats the nice part of a show that, you can spot your error quickly
@@garethparkinson9599 Glad you had a go and all very best! S :-)
Thank you
@@DARKKILLER-oj1gr Very welcome and glad to help - all best S :-)
too easy, scaling by a factor p means the new length will be p times original length and the area of a regular hexagon is just 6 times the area of an equilateral triangle with the same side length. Do some addition, subtraction of the two areas and you get the result.
Yes - there’s a couple of approaches you could use. Best S :-)
Harika bir anlatım
Glad to help and all very best S :-)
👍
@@user-kg6vz3mu4k very welcome and glad to help - all best S :-)
thanks so much
Very welcome and glad to help - all best S :-)
This was sooo useful thank you
That’s great and glad to help - all very best S :-)
why not just factorise to get ( 5y-6)(y+2)
Hi - yes, definitely an option. I just thought the formula would be better for a shorter video :-)
@@3minutemaths ahh ok i never finished a level as teacher didnt come back
@@3minutemaths i never completed a level
Sorry your teacher didn’t come back, and hope that you can still complete at some point. Glad to hear from you and hope you’re doing well! :-)
@@3minutemaths me 2 hasnt been since 2019/20
Thanks helped a lot 😁✅
this guy's so adorable
and im a guy
@@typhoon8964 Lol - thank you - and made my day! :-)
Tysm
Very welcome and glad to help - all best S :-)
I dont get the 1/2 ab part I rewached the ab part and completely missed the halfing part thank you!
Glad to help and all very best S :-)
25 mine before my test
Hope it goes well! All best S :-)
Hi, u just worked out to be +25. How did it turn out to be -25 ?
Hi - around 1.31 … when I expanded the brackets I got +25, and needed to get rid of it. The -25 cancelled out. Hope that’s OK and all best S :-)
you are a beautiful man
Lol Thank you - made my day!
THANK YOU SO MUCH OH MY GOD LAST EXAM I COULDNT FOCUS BC OF THE BOY NEXT TO ME AND I GOT TOO OVERSTIMULATED TO ANSWER ONEOF THESE QUESTIONS BUT YOUVE MADE IT SO MUCH EASIER I LOVE YOU
Lol Glad to help and all very best S :-)
I hope someone can reply to this. Please for the 2nd example uhm why is only 15 the highest factor
Hi - 4.09 - 15 is the largest number that will divide into both 15 and 45. Best S :-)
YES , HE IS BACK 🎉🎉👏🥰
Definitely! and thank you for your comment - made my day!
yay he is back again 😆😆
Thank you - really made my day!!!
@@3minutemaths 😁😁😁
HES BACK!!!
😂 just made my day! Glad to be back :-)
42 cm3
6 cm2 x 7 cm =42 cm3
7x3=21 21+21= 42 cm3
1/2 3 x4= 12/2= 6 6 cm2
a=1/2 wh
Yes … but only for the area of the triangle - you’ll need to multiply by the depth to get the volume. All best S
3 cm 4 cm 7 cm
math
Maths in the UK :-)